The common reasons for women’s leg weakness include electrolyte disorders, hypoproteinemia, knee joint diseases and lumbar spine diseases. 1. Electrolyte disorders: when a woman because of insufficient food or exercise overdose diet leads to potassium, sodium, calcium and other electrolyte disorders, especially patients suffering from hypokalemia, will be more likely to cause patients to appear leg weakness and weakness, and accompanied by loss of appetite and other symptoms. 2. Hypoproteinemia: when a woman suffers from hypoproteinemia due to kidney disease or malnutrition, the symptoms of weak legs will occur due to the lack of protein supply to the muscle tissues. 3. Knee disease: It may be due to serious osteoarthritis of the knee joint, such as arthritis, synovitis, ankylosing spondylitis, etc., which leads to knee pain when walking and weakness of the legs. 4. Lumbar spine disease: If a woman suffers from lumbar disc herniation, spinal stenosis, etc., it will lead to the pressure on the nerves that innervate the muscles of the legs, resulting in leg weakness and weakness, and also accompanied by numbness. Women’s leg weakness causes more such as myasthenia gravis and myofibrillar lesions, it is recommended to consult a doctor in a timely manner, with the help of a doctor to clarify the cause of the disease, and give targeted treatment in a timely manner.