Why does holding urine cause an erection?

Erection is a manifestation of male sexual desire, which usually occurs during kissing or before sex. However, men may also have an erection when holding their urine, which is very puzzling. In fact, the erection caused by holding urine is due to the control of the human nerves. Holding urine will stimulate the sympathetic nerves and make them excited, thereby causing an erection. Let’s take a closer look at why holding urine can cause an erection.

The cause of this phenomenon is related to neural regulation and reflex. Penile erection is mainly controlled by the parasympathetic nervous system, while ejaculation is controlled by the sympathetic nervous system. The two nervous systems inhibit and complement each other. Holding urine for a moderate amount will stimulate the urination center through the urination reflex to the nerve arc, increasing the excitability of the parasympathetic nerves that control erection, resulting in enhanced and maintained erectile function. Therefore, for those whose penis erection is not firm or lasts long, holding urine appropriately before sexual intercourse may have a better effect. Holding urine here refers to retaining an appropriate amount of urine, with a slight urge to urinate being appropriate. If a large amount of urine accumulates in the bladder, it will strongly stimulate the urination center, causing the sympathetic nerves that inhibit urination to become overexcited, thereby interfering with erection and accelerating ejaculation. At this time, if you try your best to suppress the urge to urinate and speed up the sexual intercourse, semen can still be discharged, but it will affect the sexual pleasure during ejaculation. If you stop having sex and urinate immediately, your bladder will contract quickly after urination and your penis will also quickly become flaccid. If you already have erectile dysfunction, it will be more difficult to get an erection again.

Care of male genitals: 1. Sleep soundly after orgasm . After sex, the penis needs enough sleep. When a man is sleeping soundly at night, his penis will be erect for 3-5 hours. The night erection is not for sex, but to "charge" the penis, increase blood oxygen content, and ensure the health of the penis. The more erections you have during your sleep at night, the more flexible your penis' erectile tissue becomes, Dr. Goldstein says.