Penile bacterial infection may be caused by circumcision, penile skin folliculitis, urethritis and other reasons. 1. Excessive foreskin: If the foreskin is too long, it will be easy to form a bacterial residue, which provides a breeding ground for bacteria, thus leading to penile bacterial infection. 2. Penile skin folliculitis: due to the lack of attention to genital hygiene, long time without bathing, fat secretion. It leads to the breeding of bacteria on the surface of penile skin, so it causes penile bacterial infection. 3. Urethritis: due to unclean sex life leads to the urethra breeding bacteria, bacteria will be with the urethra or vas deferens upstream to the penile tissue, thus causing penile bacterial infection. If you have a bacterial infection of the penis, you should go to the hospital in time and follow the doctor’s instructions for treatment. It is recommended to pay attention to rest, maintain good personal hygiene, and eat more fresh vegetables and fruits.