There are more factors for women to have sore legs during menstruation, clinically it may be caused by the following factors: 1. 2, caused by a lack of calcium in the body, because women’s body loses a lot of nutrients, including calcium, during menstruation, so it can cause the symptoms of sore and swollen legs; 3, it may also be caused by women’s low immunity during menstruation, the symptoms of wind and cold in the legs, or the symptoms caused by cold and fever. If the symptoms disappear after the menstrual period, it is a normal phenomenon; if the symptoms of sore and swollen legs continue to appear after the menstrual period, you should seek medical treatment in time.