If women have back pain accompanied by weakness and fatigue, there are several factors as follows: 1. Excessive exercise the day before or incorrect exercise methods and methods, resulting in excessive secretion of lactic acid and excessive accumulation of lactic acid in the body, or even excessive exercise with rhabdomyolysis, excessive accumulation of acidic metabolites in the body with elevated creatine kinase, which can lead to the above clinical symptoms. 2. Women may also have back pain and weakness during physiological periods, The clinical symptoms and manifestations of weakness do not require special treatment at this time, just continue to observe the situation. 3, the above symptoms can also occur when women have endocrine disorders, such as puberty and menopause, the imbalance of estrogen and progesterone secretion levels in the body will appear the clinical manifestations of lumbar acidity and general weakness. 4, women often lead to insufficient blood supply to the heart and cerebrovascular ischemia when the deficiency of qi and blood deficiency, will appear after exertion lumbar acidity and weakness of the body. The situation.