NDA Medical: Common Rejection Reasons and How to Fix Them
Last year, a student came to us devastated.
He had cleared the NDA written exam. Got recommended at SSB. His family had celebrated. And then the medical board declared him temporarily unfit because of a condition his spine X-ray caught on that day.
Nobody had told him about spinal X-rays. Nobody had told him to get evaluated. Two years of hard work and this was the outcome. Not because he was weak. Not because he lacked potential. But because no one sat him down early enough and explained what actually happens inside that medical board room.
We do not want that to happen to you.
This guide covers every major NDA medical rejection reason we have seen across years of training students at Alpha NDA Academy in Sikar. We are going to tell you what the board looks for, what gets candidates rejected, and more importantly, what you can do about it starting today.
If you are in Class 10 or Class 12 right now, you have time. Use it well.
What the NDA Medical Examination Actually Involves
Most aspirants think of the medical exam as a formality. Clear the written paper, clear SSB, and the medical will sort itself out. That assumption is wrong, and it costs students every single year.
The NDA medical examination is conducted at a military hospital after your SSB recommendation. A Service Medical Board examines you thoroughly from head to toe. Eyes, ears, nose, throat, teeth, spine, chest, feet, knees, heart, lungs, skin, and internal organs through blood tests and X-rays.
Lumbar spine X-rays are standard. Chest X-rays are standard. An audiometry test for hearing happens. A multi-step eye examination happens. Blood tests happen. You cannot revise for this the night before. You cannot charm your way through it either.
Results come in three forms. Either you are fit and you move forward, you receive a temporary rejection where a condition is found but can be treated, or you receive a permanent rejection where the condition cannot be changed.
The genuinely important thing to know is this: most of the rejections we have seen over the years fall into the temporary category. Which means most of them were preventable with early action and early awareness.
Vision Problems: Where Most Candidates Get Stopped
Let us start here because this is the single biggest reason students do not clear the NDA medical.
The required vision standard is 6/6 in the better eye and 6/9 in the worse eye. That is with spectacles, meaning your corrected vision. But uncorrected vision standards also apply, and they matter more for the Air Force and Navy than for the Army.
Here is what causes rejection in this category:
Colour blindness is an absolute rejection for the Air Force and Navy branches. Candidates who fail the Ishihara colour perception test during examination are not selected for these services. There is no flexibility here.
Squint is more common than students realise. Many people have a very slight squint they have simply grown accustomed to. The medical board will detect it regardless.
Night blindness. Corneal scarring. Retinal disorders. These are all examined in detail.
Then there is myopia, which is the medical term for short-sightedness. Students who study for years under poor lighting, who stare at their phone for an hour after a 10-hour study day, who have never taken eye health seriously, these students see their myopia worsen every year. If it crosses the permissible limit, rejection follows.
About LASIK, because this question comes to us regularly. Students ask whether getting LASIK surgery before the medical exam helps. The answer is no. LASIK is not permitted for NDA candidates under official guidelines. This option is simply not available to you.
So what should you actually do?
Visit an ophthalmologist, not a shop that makes glasses, but a proper eye doctor. Ask specifically whether your current vision meets NDA standards. Do this at least 8 months before your expected medical board date. If there is a problem, you want to know now, not the day your SSB result arrives.
And protect your eyes during your preparation years. Study in proper lighting. Take breaks. The 20-20-20 rule works: every 20 minutes, look at something 20 feet away for 20 seconds. It genuinely reduces eye strain. Sleep 8 hours because your eyes rest and recover during sleep.
Weight, BMI, and Chest: More Common Than You Think
Here is something that surprises almost every student when we first tell them.
A significant number of NDA candidates receive temporary rejections not for being overweight, but for being underweight.
Think about the typical Class 11 student preparing for NDA. Growing rapidly, studying 8 to 10 hours a day, eating irregularly, surviving on chai and maggi at odd hours. By the time such a student walks into the medical board, their weight is below the minimum on the official armed forces height and weight chart.
The chest measurement standard for male candidates requires a minimum unexpanded chest of 77 cm, and this must expand by at least 5 cm on a full breath. Poor lung development and weak chest muscles are caught here.
None of this is fixable in two weeks. A year of poor nutrition cannot be reversed with one month of eating properly. This is a genuine long-term effort.
Start today. Eat properly at every meal. Include adequate protein, rice, dal, eggs, chicken, paneer, whatever suits your diet. Sleep 8 hours. Run regularly because running builds lung capacity and chest expansion better than most exercises. At Alpha NDA Academy, physical training is part of the daily schedule, so residential students are building this fitness every single day without having to think about it separately.
Track your weight every two weeks. Know where you stand against the official NDA chart. If you are below the minimum, treat this as seriously as you treat your Mathematics revision.
Flat Feet and Knock Knees: The Conditions Students Do Not Know They Have
This section is important for a very specific reason.
Most students who have flat feet or mild knock knees have never been told about it. They run normally, walk normally, and play cricket on weekends without any pain. And then the medical board examination identifies it on that day and they are declared unfit.
Flat feet means the arch of the foot is absent or very low. Stand on a wet floor and look at your footprint. A normal foot leaves a curved gap in the middle arch area. A flat foot leaves almost a complete footprint because the arch is collapsed.
Why does the armed forces care about this? Because officers run, march, and carry load for years. Flat feet cause incorrect stress distribution through the joints, leading to pain and injury over time. The armed forces need officers who can sustain this for decades.
Knock knees is a condition where both knees angle inward. When you stand with your feet together, people with knock knees will have their knees touching but a visible gap between their ankles. Severe cases affect running mechanics and long-term joint health.
Go to an orthopaedic doctor. Ask specifically about flat feet and knee alignment. If you are 15 or 16, there is genuine time to improve mild flat feet through strengthening exercises. Towel scrunches, calf raises, balancing exercises, and walking on uneven ground regularly all strengthen the arch muscles over 12 to 18 months of consistent effort.
For knock knees, targeted strengthening of the hip abductor muscles and quadriceps can reduce mild cases. Moderate to severe cases need proper specialist advice about correction options.
The key word in all of this is early. The earlier you find out, the more options you have.
Dental Health: People Laugh When We Say This, But They Should Not
Every new batch at Alpha NDA Academy gets a session on medical standards. When we reach dental health, students visibly relax. They think we are about to say something minor.
We are not.
The NDA medical examination includes a dental assessment. Candidates need to have at least 14 functional dental points. Missing front teeth, severely decayed teeth, more than two loose teeth, significant gum disease, poor bite alignment affecting chewing, heavy visible tartar buildup, these are all reasons for rejection.
Dental rejection is the most eliminatable rejection on this entire list. You can fix your teeth. A dentist’s appointment solves most of these problems. And yet every year, candidates show up at the medical board with avoidable dental issues.
Go to a dentist now. Get a full mouth checkup. Fill cavities. Get scaling done. If you have any loose teeth or gum inflammation, get it treated, because gum disease does not resolve on its own.
Brush twice daily. Use floss. This takes five minutes a day and prevents significant problems. The cost of dental negligence at the NDA medical board is years of preparation wasted.
Deviated Nasal Septum: The Hidden One
The septum is the thin wall of cartilage that divides your nose into two passages. A large number of people in India have a slightly off-centre septum. For most, it causes absolutely no problem.
But a significant deviation that actually blocks airflow through one nostril, causes recurring sinus infections, creates breathing difficulty during physical activity, or shows up clearly during examination, is a reason for rejection.
Many students have this condition and have simply never been told about it. Some have learned to breathe through their mouth automatically. They do not notice a problem because their body adapted years ago.
Signs worth paying attention to: difficulty breathing through one nostril, frequent sinus headaches, recurring nasal infections, heavy snoring at night. If any of these apply to you, visit an ENT specialist and ask about your nasal septum specifically.
If surgical correction is needed, it is a common procedure called septoplasty with a recovery time of a few weeks. But you need to time it correctly. If your medical board is 18 months away, you have time. If it is 3 months away, this surgery is not an option. Find out where you stand now.
Other ENT issues that matter: a perforated eardrum is a rejection reason. Chronic ear discharge or infection is a problem. Significant hearing loss detected during audiometry will lead to rejection.
Protect your ears. Avoid using earphones at very high volumes for extended periods. Many teenagers damage their hearing over years of this habit without realising it.
Tattoos: This One Has No Workaround
The NDA rule on tattoos is specific and firm. Permanent tattoos are acceptable only on the inner side of the forearm, between the elbow and the wrist on the inside.
Anywhere else is a rejection. The back of the hand, the outer wrist, the upper arm, the chest, the neck, the face, any location that is visible when wearing a uniform. The rule is clear and there is no case-by-case evaluation for location.
We have genuinely had students come to us with tattoos on their forearms or necks that they got during Class 12 without thinking about NDA medical standards. Once they understood the problem, they were under time pressure and financial stress to get laser removal done in time.
Do not put yourself in that situation. If you are serious about NDA, do not get tattoos in non-permissible areas. If you already have one in a problematic location, start looking into laser tattoo removal now. It takes multiple sessions spaced weeks apart, and the skin needs to fully heal before the medical board.
Skin Conditions
Active widespread skin conditions like psoriasis, eczema, or vitiligo covering a significant portion of the body surface are assessed during the medical examination and can lead to rejection.
Active fungal infections at the time of examination are also problematic.
Manage any existing skin conditions through proper dermatological treatment. Do not wait until the month before your board. If you have a chronic skin condition, get it under a dermatologist’s care as early as possible and keep it well controlled.
Good skin hygiene is also genuinely important. Bathe daily, wear clean clothes, and do not let minor infections go untreated and spread.
Spine and Posture: The X-Ray Will Find What You Cannot See
The lumbar spine X-ray is standard in the NDA medical examination. This is not something most students know about until they walk into the room.
Significant scoliosis, which is sideways curvature of the spine, is caught on X-ray. Old spinal fractures that were never properly treated and left a deformity are a reason for rejection. Compression of a vertebra is disqualifying.
Here is the uncomfortable truth about this one. Some spinal findings develop slowly over years of poor posture. Students who sit hunched over their study table for 8 hours every day, who carry heavy school bags on one shoulder for years, who sleep on very soft mattresses without adequate support, these students accumulate postural and structural issues without any pain warning them.
Take your posture seriously from today. Sit straight. If you are going to study for long hours, invest in a chair that supports your back. Do not carry your school bag consistently on one shoulder. Sleep on a firm enough mattress.
Strengthen your core. The muscles of the abdomen and lower back are what protect and support your spine. Planks, bridges, and basic core exercises done daily make a real difference over months.
Do yoga. Even 20 minutes of basic yoga focused on spinal mobility and core strength, done consistently four to five days a week, visibly improves posture over a few months.
If you have had back pain that lasted more than two weeks at any point, see an orthopaedic doctor. Do not assume back pain in a teenager is normal and will pass.
Chronic Medical Conditions
Some conditions are incompatible with armed forces service and lead to permanent rejection. You need to know about them clearly.
Diabetes mellitus is disqualifying. Blood tests during the medical exam detect elevated blood sugar. Maintain a healthy lifestyle, exercise regularly, and avoid a diet heavy in refined sugar and processed food. At your age, diabetes is preventable with the right habits.
A history of epilepsy or seizure disorder is a permanent rejection reason.
Bronchial asthma with a documented history of repeated attacks is assessed very carefully. Childhood asthma that is clearly resolved may sometimes be viewed differently, but active asthma is a rejection reason.
Significant heart conditions detected on ECG or physical examination.
Mental health conditions that are active at the time of examination.
If any of these apply to you or appear in your medical history, get a specialist evaluation and understand exactly where you stand. Some conditions that appear in old records may have resolved or may have been misdiagnosed. Do not assume either way. Get clarity from a doctor.
A Timeline to Actually Follow
Here is what we tell every student who asks us how to approach this.
If you are 12 to 18 months away from your expected medical board, get a comprehensive health evaluation now. Eyes, ears, teeth, spine, feet, knees, blood tests, weight relative to the NDA chart. Know where every issue is.
At 6 to 9 months away, all treatments should be well underway or completed. Correctable conditions should be addressed. Your fitness routine should be consistent, not something you are starting now.
At 3 to 4 months away, do a follow-up evaluation. Confirm that issues have resolved. Avoid new physical risks. Continue what you have already built.
In the final month before the board, sleep well, eat well, carry all your medical records and documentation, and be transparent with the board about any past conditions that are now resolved. Hiding medical history is always the wrong decision.
If You Are Rejected, This Is What You Need to Know
Candidates who are declared medically unfit can apply for an Appeal Medical Board. It is conducted at a different military hospital by a completely fresh set of medical officers.
Your rejection letter will explain the exact process and the timeline within which you must apply.
For temporary rejections, the letter will specify the condition, the required treatment, and when you can reappear. Once treatment is completed and the specified period has passed, you return for re-examination.
Do not panic if you receive a rejection. Read the letter carefully. Understand whether it is temporary or permanent. If you believe the finding is incorrect, the Appeal Medical Board exists for exactly this reason.
What We Do at Alpha NDA Academy
Medical fitness at Alpha NDA Academy is not a separate chapter in our programme. It is part of the daily routine from the first week a student joins.
Morning physical training builds real fitness. Lung capacity improves through consistent running. Body weight normalises through structured eating and exercise. Posture corrects through daily physical discipline and awareness. Feet and knee joints strengthen through proper training. By the time a student from our academy faces the medical board, their body has been building toward that standard for months or years, not weeks.
We run dedicated awareness sessions on medical standards in every batch. Students who join our Arjuna Batch after Class 10 leave the first month with a clear list of what to get evaluated and what habits to build. Students in Bulls Eye and Spartans Batches get targeted guidance based on their closer timelines to the medical board.
We also speak with parents, because many of the corrective actions, specialist appointments, dental work, orthopaedic evaluations, require family involvement and support.
If you want to prepare for NDA with a system that takes every stage of selection seriously, including medical fitness, speak with us. Call or WhatsApp our admission mentor directly at 7240040400.
For a complete understanding of how to crack the NDA written exam and structure your month-by-month preparation, our detailed guide is here: NDA Preparation Tips 2026: Complete Strategy with Alpha NDA Academy
One Last Thing
The NDA medical standards are not designed to eliminate good students. Every single criterion exists because the job of an officer in the Indian Armed Forces is physically demanding in ways that most people never experience. Years of running, marching, operating in extreme conditions, going without sleep. The medical board ensures that the people selected can sustain this for 20 to 30 years of service.
Most of the rejections in this guide are correctable. Most of them are preventable. The students who get blindsided at the medical board were simply not told about these things early enough.
You are reading this today. You now know.
Take your eyes seriously. Eat properly. Exercise daily. Check your teeth, your feet, your spine. Fix what can be fixed. And walk into that medical board having done everything within your control.
That is all you can do. And when you do it, it is enough.
Frequently Asked Questions
What is the most common reason for NDA medical rejection?
Vision problems top the list. The required standard is 6/6 in the better eye and 6/9 in the worse eye. Colour blindness, squint, significant myopia beyond permissible limits, and night blindness are the most frequently seen vision-related rejection reasons. Underweight candidates and flat feet are also among the common causes.
Can I join NDA if I wear spectacles?
Yes, provided your corrected vision meets the required standard. Get your eyes evaluated by an ophthalmologist who checks specifically against NDA vision criteria. A general glasses prescription alone does not tell you enough.
Is LASIK surgery allowed for NDA candidates?
No. LASIK is not permitted under current official NDA guidelines. Do not build your plan around this option.
What is the minimum height for NDA?
157 cm for male candidates in the general category. 152 cm for female candidates. Candidates from specified hilly and tribal regions receive a 5 cm relaxation. The Air Force Flying Branch requires 163 cm and has additional anthropometric requirements.
What happens if I get rejected in the NDA medical exam?
You can apply for an Appeal Medical Board at a different military hospital with fresh medical officers. For temporary rejections, the specified condition, required treatment, and review timeline are mentioned in your rejection letter. Understand your letter fully before making any decisions.
How early should I start preparing for NDA medical fitness?
Right now, wherever you are. The ideal is 12 to 18 months before your expected medical board. This gives you adequate time to identify issues, get proper treatment, complete recovery, and build physical fitness consistently.
Do tattoos cause rejection in NDA?
Yes, if they are outside the permissible area. Tattoos are only allowed on the inner side of the forearm, between elbow and wrist. Tattoos anywhere else, back of the hand, upper arm, neck, face, chest, are disqualifying. If you have tattoos in a non-permissible location, look into laser removal immediately.
What is the minimum chest measurement required?
Male candidates need a minimum unexpanded chest of 77 cm and must show at least 5 cm of expansion on full inhalation. Build this through consistent cardiovascular training over months.
