The position of the penis is hidden, its cavernous body is elastic and covered with a tough white membrane. It is generally not easy to cause harm. However, it may be damaged if it is directly pressed by external forces or straddled. Although there is no exact statistics about penis trauma. But experts say that about 5% of men may suffer some form of penis trauma. The risk factors and timing of penis trauma mainly include: sexual activity usually provides opportunities for penis swelling and fracture, especially when the action is too intense or the penis is severely oppressed by the female body; When riding a bike or martial arts; Take off pants, urinate and zip; When moving an angular object; Bite or squeeze by a dog; Knife wound, arrow wound, gunshot wound, etc. Age group prone to penis injury: 20 ~ 40 years old, men with frequent sexual life and more activities. The probability of penis injury is the greatest. The injury of penis trauma varies with the direction and size of external force. The main symptoms include pain, swelling, hematuria and dysuria. In addition to the above-mentioned penile fracture, there are several possible penile injuries: (1) Penile contusion: it is mostly caused by the direct action of blunt external force when the penis is erect, ranging from blue-purple ecchymosis to subcutaneous, cavernous or glans hematoma, and the pain is unbearable. On the wedding night, the penis is inserted too hard, the foreskin or foreskin frenulum may be cut, or the foreskin glans may be scratched or edema. Lighter people generally just need to rest and connect scrotum and penis with T-belt. When there is still tragic blood in the acute phase. Can be cold compress, after the bleeding stops, use hot compress to promote the absorption of hematoma, and give antibiotics if necessary to prevent infection. In severe cases, the skin can be punctured or cut to release hematocele. If necessary, the bleeding point can be ligated. And gently squeeze the cavernous body to prevent the hematoma from liquefaction. If the doctor is late, the hematoma liquefies or secondary infection forms abscess or emphysema, incision and drainage or puncture can be used to discharge pus. Don't make your illness worse or have advanced lesions because you are ashamed to see a doctor. (2) Dislocation injury of penis: The penis is twisted during erection, or it is hit by blunt violence when it is weak, which leads to dislocation of the companion stem from its skin to the thigh root or scrotum perineum. Besides hemostasis and manual reduction, the penis must be fixed in the normal position with suture. (3) Incarcerated penis injury: Due to curiosity, abnormal sexual desire and eccentricity, the metal ring, plastic ring and even big nut are not taken out in time, or the penis foreskin is not reset in time after upturning, resulting in blood circulation disorder at the constricted end and limited venous return, so edema occurs, and even arterial blood supply is blocked in severe cases, leading to tissue necrosis. The key to treatment is to remove foreign bodies as soon as possible (such as sawing off metal rings and nuts). Too long and too tight foreskin can also lead to incarceration during sexual intercourse. See a doctor from time to time. (4) Penile amputation: War injury, sharp instrument injury, dog or livestock bite can all cause penis amputation. If the separation time is short and the edge is neat, replantation surgery can be carried out in time, which can often maintain a certain erectile ability and function. (5) Open laceration: It is more common in industrial and mining areas, and needs to be debrided and sutured in time. (6) Exfoliation injury (avulsion injury) of naked penis skin: Because the penis skin is thin and the subcutaneous tissue is loose, it can be twisted and avulsed by machine, while the lower tissue of deep fascia of penis is intact. If the avulsion skin is still connected with normal tissue and the color is good, it can be preserved as much as possible during debridement. There is a good chance of survival after suture. If it is completely avulsion, skin grafts from other parts can be used. (7) Pinch the penis skin: It is most likely to be pinched by the zipper when wearing pants or urinating. To avoid this, first of all, you should always wear underwear or underpants. Secondly, be careful when decompressing. Thirdly, once the penis is clamped, you can put some vegetable oil on the zipper. Or you'd better ask a doctor for help. It is best not to pull the zipper hard or try to pry it open.