I got penis infection after sex with my girl friend.after treatment of infection,my penis is very weak and cannot stand... I m worried about this.. help me out with this.. is there any chance of disease..

Penis infection for sure. Chance of disease for sure. Go to the doctor. They will most likely give you pills to take.

The longer you wait the more likely your penis will suffer grave consequences.

Sure there is always a good chance of many infections or other STDs. You need to go to your doctor or public health facility