A bulging knee may be caused by trauma, knee inversion, osteoarthritis of the knee and other reasons.
1. Trauma: if the knee is traumatized, causing corresponding damage to the medial collateral ligament of the knee joint, resulting in abnormal joint alignment bulge, and leg flexion and extension is not straight, pain and other uncomfortable symptoms.
2. Knee inversion: it may be caused by rickets, or it may be that with age, meniscus degeneration, bone wear, cartilage wear, wear and tear of the medial knee joint structure increases, resulting in the formation of the inversion deformity of the knee joint, which results in the situation that the knee is bulging and the leg is not straight.
3. Osteoarthritis of the knee joint: in the case of the elderly, it may be due to the osteoporosis and decalcification of the bones in the knee joint, leading to osteoarthritis of the knee joint, resulting in the phenomenon of the knee bulging and the leg not being straight, and accompanied by pain and swelling in the knee joint.
If you have a bulging knee that is not straight, you should go to a regular hospital in time to find out the cause of the problem and take targeted treatment under the guidance of a professional doctor.