It is a good sign that men’s sexual function is normal. Clinically, it is called morning erection, which is a physiological phenomenon unique to every man and occurs between 4 and 7 am. As men wake up and slowly move and urinate, the morning erection can disappear automatically, and as men grow older, the phenomenon will gradually decrease and fade. Men should develop regular habits, avoid staying up late, avoid emotional and stressful situations, adhere to the habit of physical exercise, quit smoking, quit drinking, eat a light diet and eat more fruits and vegetables, which will help to maintain the morning erection and improve the sexual function of men. Avoid the habit of excessive masturbation, as it can lead to a decrease in the sensitivity of the glans, as well as affect the filling of the penile corpus cavernosum, resulting in sexual dysfunction such as impotence and premature ejaculation, which can also lead to a decrease or fading of the morning erection.