Women in the middle of pregnancy at this stage early pregnancy reaction basically disappears, but the physical condition weakens, the amount of exercise decreases and the weight gradually increases. The muscles of the lower back are easily affected by strain or stimulated by wind and cold, causing soreness and pain, which can never be relieved by medication during pregnancy. Therefore, it is recommended that women during pregnancy take good rest while maintaining a good state of mind. If physical conditions allow, you can take a moderate outdoor walk to breathe fresh air, and at the same time, you should eat a reasonable diet to supplement nutrition while controlling your weight, which will not only reduce the burden on the muscles of the lower back, but also reduce the burden on the heart, brain and blood vessels and other important organs, which will help the health of pregnant women during pregnancy and the healthy development of the fetus. If self-treatment does not relieve the problem, hospital consultation is recommended.