The inner side of the foreskin is red and swollen and needs to be diagnosed as the type of disease before further measures can be taken. Usually, the inner side of the foreskin is red and swollen commonly due to glansitis, as the foreskin and penis are repeatedly stimulated by the foreskin scale, which eventually leads to redness and inflammation of the inner side of the foreskin, edema and ulceration. Usually the two conditions of circumcision and glansitis occur simultaneously, when encountering this situation generally apply erythromycin ointment topical, followed by dandelion and big green leaf boiled water external wash, 2 times a day, after 1 week of treatment can basically be cured. In later life to actively prevent the foreskin and glans personal hygiene, daily rinse with water to keep the local no longer stimulated by the foreskin scale. The rare redness of the inner foreskin is seen in the syphilis of venereal disease, this disease should first go to the hospital to do the syphilis virus test, confirmed after the syphilis can be used for medication.