Dear Krishna, I got your question and understand your concern about hair fall and semen emissions during sleep. Masturbation does not cause hairfall. Masturbation in private or with a partner is considered a normal and healthy part of sexual enjoyment.Masturbation is not a disease hence no adverse effects. Night emissions or ‘wet dreams’ are normal physiological events. Semen is being manufactured by genital organs continuously; it has to be expelled by some means. This situation is just akin to a glass of full water to which you add more water, with the logical result that it overflows! This happens to semen too. If one neither has sex nor masturbation for long time, semen gets expelled in the form of wet dreams, which is normal. You are worried because of lack of required knowledge. Do not let lack of knowledge ruin your mental stability. I suggest psychological counseling with trained psychiatrist. Hope, I have answered your question. If you have any further questions I will be happy to help. Wish you good health.