Women with low back pain and weak legs and no strength in the legs may be caused by the following reasons: a. Over fatigue caused by. Seen in women who have done excessive activities, resulting in excessive fatigue of the muscles of the lower back and lower limbs, resulting in the above symptoms. Most modern women do not exercise often, and if the amount of activity is relatively large, it may lead to severe fatigue and produce the above symptoms. Second, the lumbar intervertebral disc protrusion caused by. Many women need to sit and stand for a long time due to their profession, which may lead to lumbar degeneration and lumbar disc herniation. Once the herniated compression stimulates the nerve roots, it may produce back pain, accompanied by the symptoms of weakness of the lower limbs. Third, osteoporosis caused by. The high incidence of osteoporosis in women, due to insufficient food, or changes in hormone levels in the body, resulting in such diseases, the symptoms described above. Fourth, caused by malnutrition. Some women lose weight excessively, which can cause severe malnutrition in the body, and then produce the above symptoms.