I'm suffering from hairfall at the age of 20. please dr recommend me some medicines and how to take care of hair?

Start at primary Dr.: One's primary care doctor can check for medical causes. If none are found, then one can see a dermatologist, especially one specializing in hair restoration (some possible treatments: minoxidil, finasteride,...). Medical causes may include: hormonal problems (low thyroid), seborrhea, alopecia areata, stressful illness. Other causes: genetic male or female pattern baldness, telogen effluvium.