The pain in the soles of the feet when sleeping is mainly seen in patients with achalasia and metatarsal tendonitis, due to inflammation at the beginning of the metatarsal tendon membrane and the metatarsal tendon membrane, resulting in increased pressure in the interstitial space of the tissues, and blood stagnation occurs as a result of the obstruction of blood reflux, and the stimulation of inflammation together with the stagnation of blood will lead to the emergence of pain. When a person sleeps, he or she is usually in a lying position, and the blood circulation in the feet is much less affected by gravity than in a standing position, so the blood circulation in the feet will be improved and the symptoms will be alleviated. After sleeping and moving down to the ground, due to the influence of gravity, the blood circulation in the foot becomes poor again, thus the pain will be aggravated or the pain will appear, mainly due to the influence of gravity. After the activity, the squeezing of the local tissues and the contraction of the leg muscles will help the blood return, and the symptoms will be reduced again.