1, sitting for too long will hurt.

2, it may be a muscle strain. Muscle strain is a chronic and repeated accumulation of subtle injuries. It often occurs in areas where muscles are constantly tense due to excessive muscle activity or fixed posture. It can be divided into acute and chronic. The common parts are the muscles of the waist, neck and legs. Clinical manifestations: muscle weakness, fatigue, soreness, local tenderness, limited range of motion, decreased labor ability, followed by persistent pain, soreness, muscle induration, dysfunction and so on.

Good luck! ! !