There is localized edema of the penis, which may be caused by physiological and pathological reasons, such as infection, foreskin incarceration and so on. 1. Physiological reasons: it may be that the patient’s underwear is too tight, mechanically strangling the local skin of the penis, resulting in poor blood flow to the tissue edema. 2. Pathologic causes: (1) Infection: mostly due to bacterial or fungal infection, causing local inflammation of the penis and local skin edema. For example, circumcision, glansitis, may appear red, swollen, oozing, also accompanied by pain and so on. (2) circumcision inlay: some special people have long foreskin or circumcision, etc., in the process of bathing or other reasons will be turned out of the foreskin, the foreskin can’t fall back, there is a circumcision inlay, resulting in poor blood circulation, there may be localized edema. When there is localized edema of the penis, it is recommended to consult a doctor, follow the doctor’s instructions for further examination, with the help of the doctor to clarify the cause, and targeted treatment.