Backache During Pregnancy: London Health

Pregnant women often experience back ache because the ligaments that support the joints become looser to prepare for giving birth; as the baby grows, the additional weight can also put pressure on the back and the hollow in the lower back may also get larger which can contribute to back pain. To ease back pain:

Wear flat shoes
Sleep on a firm mattress
Avoid heavy lifting
Sit with your back straight
Consider wearing a back support
Consider having massages as these will help to reduce tension in the muscles, as well as helping you to relax
Get plenty of rest
See your doctor if the pain becomes severe or persistent; they may recommend you have physiotherapy