What happens when a person keeps a pillow between legs while sleeping?

Placing a pillow between legs while sleeping supports natural curvature of spine, explained Dr RR Dutta, HOD, internal medicine, Paras Health. "This reduces muscle tension and prevents conditions like sciatica, where nerve compression in the lower back causes radiating pain down the legs," he stated. "Additionally, this sleeping position improves joint health," said Dr Dutta.