The purple color of the glans may be caused by the obstruction of blood flow or inflammation, the obstruction of blood flow can usually be treated with aspirin and other drugs, and inflammation can be treated with erythromycin and other drugs. 1. Obstructed blood flow: the glans is purple due to the obstruction of blood flow, you can take aspirin, clopidogrel and other drugs with anti-platelet aggregation under the guidance of the doctor. Long-term improper use of drugs may be nausea, vomiting, epigastric discomfort or pain and other adverse reactions, patients should follow the doctor’s instructions for medication. Patients who are allergic to this product are prohibited. 2. Inflammation: If inflammation causes the glans to be blue-purple, antibiotic medication such as tetracycline and erythromycin should be taken under the guidance of a doctor. Long-term improper use will cause damage to the stomach and intestines, tetracycline drugs, erythromycin and other macrolides allergy is prohibited. It is recommended that patients keep the affected area clean and go to the hospital in time for examination to exclude other diseases, do not self-medication to avoid danger.