Penile inflammation can be caused by infection, circumcision, masturbation injury and other reasons as follows: 1. Infection: due to bad hygiene habits, unclean sexual intercourse, infected with trichomonas, chlamydia, candida albicans, mycoplasma and gonorrhea and other pathogenic bacteria, which can cause penile inflammation. 2. Hyperemesis gravidarum: Due to hyperemesis gravidarum or hyperemesis gravidarum, the impurity between the foreskin and the glans can not be cleaned in time, and the dirt inside the foreskin stimulates the local mucous membrane, thus triggering priapism. 3. Masturbation damage caused by: due to young people have a strong libido, often have masturbation habits. Masturbation action is sometimes too rough, can cause different degrees of penile epidermis damage. Mental excitement during masturbation, may not notice the damage, the wound is easy to be contaminated by bacteria, thus causing penile inflammation. When the symptoms of penile inflammation appear, you should go to the hospital in time, and actively treat the disease to avoid further progress.