Penile distension can be caused by persistent sexual stimulation, circumcision, penile allergic dermatitis, penile venous reflux disorder, etc., which need to be treated with medication or surgery according to the cause. 1. Continuous sexual stimulation: Continuous sexual stimulation leads to continuous congestion of the corpus cavernosum of the penis, so the penis will be distended, which is a physiological phenomenon. 2. Circumcision: This disease may cause the accumulation of dirt in the coronal groove and other parts of the body, and a large number of bacteria gather and proliferate, causing inflammatory oozing and congestion in the glans and other parts of the body, so the penis will be swollen. Need to remove part of the foreskin through surgery. 3. Penile allergic dermatitis: Penile skin contact with hair, dander, dust and other allergens lead to skin allergic reaction, rash and congestion. It can be treated with local dexamethasone ointment and loratadine cream. 4. Penile venous return obstruction: penile varicose veins, venous thromboembolism and other factors lead to penile venous return obstruction, penile bruising and penile distension symptoms. It needs to be corrected by surgery. There may be other reasons for penile distension, and patients need to consult a doctor for timely examination and early treatment. All of the above medications need to be applied under the guidance of a doctor.