Enlargement of penis is mostly caused by infection, post-circumcision and so on, which can be treated by general treatment, medication and so on. 1. Infection: (1) General treatment: general treatment can be used for mild cases of penile enlargement, i.e. keep the private parts clean and dry, change and wash the underwear diligently to avoid bacterial reproduction in order to improve the symptoms. Prohibit eating spicy and other stimulating foods. Do not have sex for a while and wear relatively loose pants. (2) medication: for patients with more serious symptoms of infection, medication can be used, such as taking cephalosporin antibiotics under the guidance of a doctor. 2. After circumcision: local small blood vessels are cut off, causing local blood reflux obstacles, causing swelling, you can use iodine povidone to disinfect, prevent infection of the wound, keep it dry, if the swelling is obvious and accompanied by bleeding, you can apply a local cold compress, and in serious cases, go to the hospital immediately. The causes of penile enlargement are more, mosquito bites, angioedema may cause penile enlargement, it is recommended that the patient seek medical attention in a timely manner to clarify the diagnosis, symptomatic treatment, so as not to delay the condition.