About 50 % to 70% of expectant mothers not only suffer from pregnancy sickness and labor pains but also experience the unwelcomed back pain. Generally, back pain first appears in the second half of pregnancy along with the change of your body weights. Back pain in pregnancy is more likely to place more strain on the expectant mothers.
The symptoms of the back pain in pregnancy are often described as dull or continuous aches in the lower back. For most women, pain appears in the sacroiliac joint where the pelvis attaches to the spine. In most cases, young mothers, mothers who have had multiple pregnancies, or the expectant mothers who have weak back before, are more likely to suffer from the pain in the lower back. The symptoms often start numbness in the morning and then intensify throughout the whole day.
Pregnancy back pain reasons are numerous and various. Followings are some common but probably causes.
1. Gaining weight. Generally, the weight of a healthy pregnancy will increase about 25 to 35 pounds, and this added weight need the support from the spine. However, the spine may not bear the unexpected weight and then uncomfortable symptoms may occur in the lower back. What’s more, the weights of the baby are growing at the same time, which will not only bring great pressure to the blood vessels but also to the nerves in the pelvis and back.
2. Changing of posture. Your uterus becomes heavier as well as your weight, then the center of body gravity changes at the same time. You may begin to adjust your posture and the way you move and walk gradually. You may not notice these changes at first; however, you cannot avoid the pain or strain it has brought about to you.
3. Changing of hormone. During pregnancy, you body will produce a kind of hormone which known as relaxin because it can relax the ligaments in the pelvic area. If the joints become looser, it will contribute to you birth process. However, this kind of hormone can also cause ligaments that may loose your spine and bring about instability and pain in your back.
4. Muscle separation. Two parallel sheets of muscles, which slipped out from the rib cage to the pubic bone, may separate down along the center seam as the uterus expands. You back pain may get worse when this separation occurs.
5. Emotional stress. You may suffer from back pain or back spasms if you are under great emotional stress. During your pregnancy, you may find that you experience an increase in back pain.