Hair loss and acne. Please advice me.

When I was 19 years old I used to scratch my head and pull out something attached to hair follicle during my studies, it repeated till the age of 21. At 21, my hairs became dry and dandruff arose. Since I was in midst of my studies I ignored them. But reaching age 22, I got my hair thin and showed little patch in the upper mid section of head, during which I was in vacation and used to masturbate twice a day for nearly two months. I practice very good food intake non-veg twice a week. But at the age of 23 I bald my head for the 1st time since my puberty and disappointed that my hair grew very slow and didn't reach the previous status. Having led to deep corners on either sides and patches on few sides my hair has become thin and skin had turned bit dark too. I see my scars thickening. I sleep late at night and use laptop since I am in higher degree now. I've decided to go to treatment but expect an expert to conclude my problem and give the reason beyond it. Please advice me.