The foreskin is a little painful without redness and swelling, which is mainly considered to be related to external injury, circumcision and short foreskin. 1. External injuries: such as being scratched by the bedding zipper, or being stabbed by a needle-like object, there may be pain in the foreskin and no redness or swelling of the symptoms. 2. Circumcision: in the early stage of the disease, the patient’s foreskin has no obvious symptoms of redness and swelling, and can only be manifested as localized pain. With the development of the disease, the symptoms of redness and swelling of the foreskin will gradually appear. 3. short foreskin: after full erection, due to the extension of the foreskin is not strong, can cause local skin pulling, and then pulling pain. Appearance of foreskin pain, and no symptoms of redness and swelling, the etiology is complex. It is recommended that patients must go to the hospital in time to confirm the diagnosis, and combined with the cause of the disease, follow the doctor’s instructions for treatment.