Protruding knee may be a normal phenomenon without treatment, or it may be caused by knee valgus, meniscus cyst, osteoarthritis and so on, which need to be treated by physical therapy, medication or surgery according to the cause. 1. Normal phenomenon: if the body is relatively thin, it may cause the knee to be too prominent, which is a normal physiological manifestation and can be left untreated. 2. Bursitis: Bursitis can lead to swelling of the knee, which can also cause the knee to protrude. For bursitis patients need to be under the guidance of the doctor with prednisolone acetate, methylprednisolone and other corticosteroids. In addition, for patients with recurrent bursitis, bursal resection is needed. 3. Meniscus cysts: For knee protrusion caused by meniscus cysts, it is necessary to take cyst local excision, excision of damaged meniscus and cyst treatment. If the patient has knee pain, he needs to follow the doctor’s advice with non-steroidal anti-inflammatory drugs such as Loxoprofen sodium and ibuprofen. 4. Osteoarthritis: If the osteoarthritis patient has a bone abrasion, there will also be a protruding knee manifestation. It is suggested that sodium vitrate can be injected into the joint cavity under the guidance of the doctor, or physical therapy such as hot compresses and ultrasound. In addition, patients can also use non-steroidal anti-inflammatory drugs such as celecoxib and acetaminophen as prescribed by the doctor. In addition, patients can also take surgical treatments such as joint fusion, artificial joint replacement, and osteotomy. The protruding knee may also be caused by rheumatoid arthritis, gout and so on. It is recommended that patients with knee protrusion need to consult a doctor in time, and the doctor will treat the cause of the disease.