After the knee is damaged, it is necessary to go to the regular hospital in time, give the film, magnetic resonance, according to the specific situation of the damage for targeted treatment, specific including general treatment, plaster or brace fixation, drug treatment, surgical treatment and so on. 1. General treatment: for mild knee injury, we should pay attention to bed rest, avoid going down to the ground too early, elevate the lower limbs, if the swelling and pain are obvious, we can put ice packs intermittently within 72 hours, and give hot packs after more than 72 hours to reduce the swelling and pain. 2. Plaster or brace fixation: If the knee joint injury is combined with mild bone, ligament or meniscus injury, plaster or brace fixation can be taken to maintain the stability of the tissue and promote the repair. 3. Medication: It is a common auxiliary treatment, you can take oral ibuprofen extended-release capsules, diclofenac sodium enteric-coated tablets and other non-steroidal painkillers, you can also cooperate with the bone grafting seven-centimeter tablets, tendon activation tablets and other medications for treatment, which can reduce the symptoms of local swelling and pain. 4. Surgery: If the knee joint is seriously damaged, there are serious tears of meniscus or ligament, and the fracture in the knee joint is obviously dislocated, you can choose minimally invasive arthroscopic surgical treatment or open fracture incision and internal fixation according to the specific situation, and then you can gradually carry out rehabilitation exercise according to the recovery situation to promote the recovery of joint function. In summary, after the knee joint is damaged, it is necessary to consult the doctor in time and actively cooperate with the doctor’s treatment to avoid delaying the condition. The use of drugs need to follow the doctor’s instructions.