Hair loss can also be due to dandruff
, dermatitis, shampoos, oils, soaps, dust and
dirt etc. Thyroid disorders and
diabetes too could be a cause. Insomnia, stress and anxiety along with poor diet and excess of caffeine too can be the cause.
Since I cannot examine you and know other related conditions you may be having, nor is a detailed history possible on net, I have listed the various possibilities that should be looked into.