The glans sensitivity threshold of 3.8 may be the prepuce, phimosis, too frequent masturbation, chronic prostatitis, etc., should be timely consultation to identify the cause of the disease. 1. The prepuce or circumcision: the glans is less contact and stimulation with the underwear or the outside world, resulting in high sensitivity and a lower sensitivity threshold. 2. Masturbation is too frequent: if too much stimulation of the image products, and the formation of bad reflexes, resulting in a lower sensitivity threshold of the glans. 3. Chronic prostatitis: when suffering from chronic prostatitis, due to the stimulation of inflammation, sometimes it can also cause increased sensitivity, lower sensitivity threshold. This is not enough to diagnose the disease, but may be caused by other factors. It is recommended that you go to a regular hospital and ask the doctor to clarify the cause of the problem and give targeted treatment.