Subcutaneous nodules on the penis are often seen in infectious diseases such as inguinal granuloma, venereal lymphogranuloma, syphilis, scabies nodules, etc. In addition to symptoms of subcutaneous nodules on the penis, patients may also have ulcers and bleeding at the lesions, and some patients may also experience itching. When a patient develops a subcutaneous nodule on the penis, he or she should go to a regular hospital promptly and cooperate with the doctor to actively find the cause and treat it.