Foreskin dehiscence may be caused by trauma, infection, chemical sensitization. It is necessary to combine the patient’s medical history and clinical symptoms to initially determine the cause. 1. Trauma:Sexual intercourse and masturbation with too much violence may cause the foreskin to crack, especially if the opening of the foreskin is narrow. 2. Infection:If the foreskin is infected by mold, bacteria, virus can also lead to skin cracks. Patients are often accompanied by itching and stinging of the foreskin, and usually have a history of unclean sexual contact. 3. Chemical allergy: some patients with local topical drugs, hygiene products cause allergies can also appear foreskin cracking. Overall, the foreskin cracks need to pay attention to, need to go to the hospital urology or dermatology examination, clear cause for targeted treatment.