If the swelling after knee rehab is mild, it is a common symptom and usually does not require special treatment. If the swelling is severe, it may indicate that an injury has been caused and requires prompt medical attention and clear judgment by a doctor. Knee rehabilitation is generally used when ligament injuries, fractures and other pathologies occur in the knee. Due to the injury itself or surgery or cast immobilization may cause adhesion of soft tissues and ligaments inside and outside the joint, limiting the joint movement. Therefore, rehabilitation training often causes temporary tissue edema, and the patient feels slight pain, but usually after stopping the training, at most no more than one day will be basically disappeared. This is very common and does not require any special treatment, or only requires elevation of the knee for ice or gentle massage. However, if after the rehabilitation exercise, there is a serious swelling, pain, joint fever, and after rest and the above treatment does not have a significant improvement, you need to be vigilant. It is possible that the training intensity is too high, or the training method is not appropriate to cause internal damage to the knee joint, at this time you need to consult a doctor in a timely manner, through the examination by the doctor to determine which is the case, and the serious cases may need to go through medical treatment again. Therefore, after the knee training swelling and pain, if the rest can not get better, you need to consult a doctor in a timely manner, by the doctor’s clear judgment, rehabilitation training should be gradual, to avoid secondary injury.