Internal dermatitis caused by long foreskin can be treated by general treatment, medication and surgery. 1. General treatment: patients should first pay attention to maintain local cleanliness, regular upturning of the foreskin, cleaning the glans, to prevent hiding dirt, aggravate the stimulation of the internal skin of the foreskin. 2. medication: long foreskin may also lead to bacterial infection, causing internal dermatitis patients can choose itraconazole, betamethasone, erythromycin and other drugs under the guidance of the doctor, can effectively kill pathogens. 3. Surgery: patients with internal dermatitis caused by long foreskin should take the surgical method of circumcision to remove the excessively long foreskin in time after the inflammation subsides, which helps to reduce the stimulation of the body. Patients with internal dermatitis caused by long foreskin should go to the hospital and choose the appropriate method to treat the disease.