Generally, if the knee is broken, most of them can be healed within 2 weeks, which is only an average figure and varies from individual to individual. In addition, in order to ensure that the wound can heal as expected, the following prerequisites must be met: first, after the injury, the wound can be given proper treatment as soon as possible, such as after the injury, need to do the early debridement suture, and then regular change of medicine for the wound. If the wound is infected, you also need to give anti-infection treatment, such as the use of antibiotic treatment. Second, the extent of the injury should not be too severe. The above discussion is only about some skin lacerations in the front or side of the knee, but if the injury is very extensive, or if the contamination is very severe, or if there is some soft tissue loss, the recovery time will be greatly extended. In this case, the doctor will help the patient recover as soon as possible through a series of surgical procedures. Third, the patient must keep the wound site clean and dry during treatment, that is, not to get wet, until the third day after the complete removal of stitches, the patient can not get wet to prevent infection.