Female unilateral knee pain symptoms, possible causes include knee trauma, knee osteoarthritis, knee joint lesions, etc., as follows: 1, knee trauma: such as mild knee sprain or severe knee fracture, can lead to unilateral knee pain symptoms, and can be accompanied by limited activity and swelling, X-ray filming can be found fracture line. 2, osteoarthritis of the knee: if the elderly woman Long-term overweight, knee joint stability decreases, knee joint will appear serious degeneration, the patient will be manifested as unilateral pain in the knee joint, obvious when loaded, and the symptoms will be reduced when resting, X-ray filming will find that the knee joint surface hardening, joint space narrowing. 3, knee joint lesions: such as knee meniscus injury, knee joint free body, etc., can produce unilateral knee pain symptoms, and can be accompanied by joints, severe limitation of movement, MRI can find fracture lines. Severe activity limitation, MRI will find the lesion site and the degree of lesion.