Knee broken skin generally takes a few days to recover, depending on the severity of the patient’s injury (such as whether the bone and joint injury), their own repair ability, whether the wound is combined with infection, and whether to take active treatment measures and other factors to analyze. First, if the degree of broken skin of the wound is relatively light, did not cause serious local soft tissue infection, their own healing ability is strong, at this time actively using vital iodine local thorough disinfection, sterile gauze bandage, oral bruising injury pill, generally 5-7 days after the local broken skin can crust healing, will not cause serious complications. Second, if the wound is extensive, and accompanied by local soft tissue infection, the formation of redness, swelling, pain, their own healing ability is poor, and did not give timely wound debridement disinfection treatment, will cause delayed healing of the local tissue, most patients often need 2 weeks of time trauma to fully recover. Third, if the knee joint movement is affected, you need to go to the hospital for medical attention.