Androgenetic alopecia have 7 grades in Male, last 2 grades are difficult to treat, may need hair transplant..you are very young so you may have in early stage, so it is curable. Don't take minoxidil, n finastride, long time user suffer from different side effects.
Using Homoeopathy medicines you will get a permanent solution & long lasting result.
Next Steps
for your hair don't use chemical shampoo,
Health Tips
you may take
dates, cumin seeds, eggs, fenugreek seed's water, green tea, almond regularly.