Whilst it is commonly comfortable to slumber in what is known as the fetal placement, with legs curled up, this might make for an uneven distribution of weight and bring about back pain and sore joints. It could also lead to hip pain (hip bursitis) and shoulder pain, like shoulder https://www.theorthopaedicandpainpractice.com/the-best-sleeping-positions-to-relieve-neck-pain/