Hi sir, Welcome to Health Care Magic I can certainly understand your concern and fear about sexual performance. As you are in young age this is quite common to worry about your performance , but there is nothing to worry as I can advise you some measures. It seems that you have crossed the limit of adequate weight for your age and height...Which is an important thing to maintain adequate weight for better sexual performance.Due to overweight, fat gets deposited in the lower abdomen and around the pubic area which may obstruct your sexual performance...Which may also lessen the blood flow to the penis... Causing decreased sexual performance and your may penis may appear smaller than usual .So I would advise you to maintain adequate weight , avoid alcohol and smoking if any , perform some pelvic exercises and regular exercise to maintain adequate weight . You have mentioned that you masturbate more which may cause over keratinization and thickness of the skin over your penis.... Ultimately result in decreased sensitivity followed by decreased performance. But there is nothing to panic, as you are still young ....So I feel it s not an impossible thing to maintain adequate weight , and try to prevent over masturbation which would happen by your will power. Try to distract yourself by being engaged in some activity or the other.you can consult your psychiatrist for further reassurance , counseling and guidance. On top of it if you feel there s no improvement you can try with drugs like sildenafil . Post your further questions if any, I will available to take up your follow up questions Thank you