Some of the most common reasons for having back pain while lying down include: Strain or sprain: As the most common causes of low back pain, lumbar strains and sprains happen when muscles or ligaments are stretched too far.

Why does laying flat hurt my back?

Poor sleeping positions can put pressure on your spine, causing its natural curve to flatten. This can also cause back strain and uncomfortable pressure on your joints. If you frequently sleep on your stomach, you may experience back pain more regularly.

When I lie down my back doesn't touch the ground?

Hyperlordosis is when the inward curve of the spine in your lower back is exaggerated. This condition is also called swayback or saddleback. Hyperlordosis can occur in all ages, but it's rare in children. It's a reversible condition.