Do you have any backpain?
Does the pain on the left side increase when you ar elying on your back or when you are lying on the left side? Never when you are lying on the right side?
Does the pain seem to be in the muscles of the abdomen or deeper inside?
Do you have any urinary problem?
It sounds likely that you have a herniated or prolapsed spinal disc.
During pregnancy, a lot or pressure is put on the spinal bones since they have to take up the weight of the uterus as well as the growing baby. Increased curvature of the spine can cause herniated discs. Once the discs herniate, the problem can persist or even increase after childbirth.
The herniated disc puts pressure on the nerves to the abdomen causing pain. When you sleep, the muscles and ligaments relax, causing increase in the herniation. This increases the pain but when you are active, the muscles of the back become taut manage to support the spinal bones, preventing pressure on the nerves.
Please consult your doctor. Tests like Xray and MRI scan will be needed for a diagnosis.
I hope this helps.
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I suspect that the backpain which you have had since the childbirth was an indication of a mild prolpase. But the prolapse has increased since the last 3 months - possibly due to some heavy activity like gardening for a long time, or hiking, or even lifting a heavy load.
And yes, pain due to prolapsed disc can occur at some time and not on others because a lot depends on the posture of the body and how well the muscles are supporting the spinal bones.
Please ask your doctor for an MRI and xray of the back at your appointment.
Pain from a herniated spinal disc may not necressarily be on the back.
Nerve fibres leave the spinal cord and curve around to the sides and front of the body. The following is a good diagram of the areas of supply of the spinal nerves as they curve around the body.
So spinal disc prolpase can cause pain along the sides of the body s well s in the front.
The site of pain will depend on which erves is compressed.