my penis tips problem on the tips very pain any time i have done it many test but all test ok. i thing this is skin prolem skin infection what can i do.. plz help me

Are you circumcised? If not then it would be a good idea. Bactia love to hang out in the foreskin. Also, you might have an infection. Lots of boys have pain from their urethra getting infected. Even playing with it during masturbation or sex can cause it a great deal of damage.

Doctor time.