Knee pain in girls is commonly caused by cold, trauma and other causes, as follows: First, cold knee: low temperature, too little clothing can lead to cold knee, which causes knee pain, the patient will have weight-bearing pain significantly aggravated, after hot compress treatment, the symptoms will be relieved. Second, knee trauma: such as up and down the stairs or in the process of sports knee sprain, can lead to knee pain, accompanied by knee swelling, as well as knee movement restrictions, the patient will walk with weight pain symptoms will increase. Rest, cold compresses, braking, rehabilitation training, and ultrashort wave therapy will relieve knee pain symptoms. Therefore, girls with knee pain should be diagnosed and treated promptly, which can make the pain symptoms disappear completely.