Sleeping with sore legs can be caused by the following reasons: first, leg fasciitis, leg fasciitis is often caused by cold, strain, can have the symptoms of leg pain after sleeping, after a while of activity can be improved, this time to early physical examination and examination, to exclude other diseases to diagnose. Second, rheumatoid, rheumatoid can involve the bones and joints of the whole body, muscles, fascia, and lead to the symptoms of leg pain after sleeping, can be accompanied by other joint pain, then we should check the joint x-ray and do blood tests to diagnose. Third, ankylosing spondylitis, ankylosing spondylitis can also be serious symptoms of leg pain after sleeping or waking up in the morning, can be accompanied by pain in the sacroiliac joints, can be accompanied by morning stiffness, this time to do blood tests and examination of the sacroiliac joints, lumbar spine X-ray to diagnose and treatment.