Women find sore legs before menstruation may have the following reasons: 1, premenstrual syndrome, some women in the pre-menstrual period due to changes in the body hormone levels lead to nervous tension, may be manifested as sore legs, but after the period this symptom will disappear. This cause of discomfort do not worry, there is no obvious harm to the body. 2, calcium deficiency, the study found that women in the body after the age of 35 will gradually lose calcium, will cause calf soreness, pain, you need to pay attention to the calcium supplement, such as eating more fish, shrimp, lean meat, high quality protein, but also can supplement calcium tablets. 3, the calf soreness caused by exercise, if you do not usually exercise or still Not to develop the habit of exercise, there will be calf soreness after exercise, is the calf muscle lactic acid production, do not be nervous, worry, soreness will gradually disappear.