The hazards that may be caused by dorsal nerve block surgery are as follows: 1. Complete loss of glans sensation, local numbness and pain of the glans can occur after surgery or no sexual pleasure during sex, unable to reach orgasm, etc. This is because the surgery completely blocks the dorsal nerve of the penis, causing a complete loss of local sensation. This is because the surgery completely blocked the dorsal nerve of the penis, resulting in a complete loss of local sensation, which is a relatively serious hazard. 2, local mucosal necrosis after surgery, which is due to the local ligation of the glans during the ligation process caused by ischemia, resulting in blackening or necrosis of the glans skin, etc. 3, surgery caused by local infection, after surgery, local redness and swelling or local skin ulceration, increased secretions, etc., need to further anti-infection treatment. 4. The surgery causes the dorsal nerve of the penis to be incompletely blocked, so the patient bears the damage to the organism caused by the surgery, but the treatment effect is not achieved, and the local sensation is still too sensitive after the surgery, causing the ejaculation time to be too short.