Hi, Thanks for posting in HCM. I understand your concern. Masturbation is a healthy and physiological normal act when done within limits. It benefits by releasing mental tension and gives a chance to produce fresh sperms. It does not cause any bone weakness or any other form of weakness. It doesn t have any connection with itchy scalp and acne. Acne is due to the hormonal changes taking place during your age. Wash the area with warm water and mild medicated soap solution twice everyday. Following that you may apply clindamycin cream and retinoic acid cream on the lesions only, if it is more in number and is big enough in size. For itchy scalp, use shampoo containing ketoconazole twice a week and shampoo containing selenium with zinc once a week. Gradually, your symptoms should subside. Hope the information provided would be helpful. All the best.