What Causes A Discharge In The Penis During Erection?

yes sir, I am 23 years old .my name is Gagan,resides at ambala, Haryana. i am an unmarried young person.due to over hand practice I am suffering from nightfalls from 5 years ago.due to this desease the density of my sperm become very low and i am feeling too much weak Now I am also suffering from urinal discharge.When my penish slightly erect a little quantityof semen comes out automaticaIly from there.plz recommend me some medicines.