The itchy glans after going to the toilet may be caused by external stimuli such as clothing, urine, or diseases such as glansitis and condyloma acuminatum. 1. External stimulation: If the male underwear is too tight, long time friction glans, it is easy to appear after the toilet glans itchy situation. Secondly, if the residual urine on the glans causes irritation to the glans, it will also cause itching. 2. Glansitis: This disease is mainly infected by pathogenic microorganisms such as Candida, anaerobic bacteria, aerobic bacteria, and secondly, it is also related to trauma, improper cleaning of foreskin scales, allergic reaction and other reasons. The patient’s glans will appear itching, red rash, pain and other symptoms, and severe inflammation will also appear low fever, fatigue, fatigue and other symptoms. 3. Condyloma acuminatum: This is a sexually transmitted disease caused by human papillomavirus, most of which is transmitted through sexual contact, and the main risk factors are having multiple sexual partners and having sex without safety measures. With the development of the disease, the male patient’s glans, coronary groove, foreskin tie and other places will appear itching, pain, light red particles and other symptoms. It is recommended that patients with itchy glans after going to the bathroom go to the hospital to improve the examination and clarify the specific cause.