Often, right knee pain is less likely to be cancer and may be due to joint damage, arthritis, etc. In most cases, unilateral knee pain is not necessarily due to cancer, many diseases can cause unilateral knee pain, such as knee joint injury, arthritis, etc.; usually the early cancer does not have strong discomfort, and the cancer arises from the joints tends to be painful, so the probability of the right knee pain is cancer is low. When the right knee pain occurs, the patient should go to the hospital for X-ray or CT examination; these examinations can effectively determine whether the patient has bone tumor disease. Patients with right knee pain should be braked and examined in a timely manner, put their minds at ease, and be treated positively.