Soreness in the thigh area after sitting for a long time, mainly consider that it may be related to the long-term tension in the soft tissue of the thigh area caused by sitting for a long time and the light strain of the muscle after standing up. Of course, may also be due to sedentary leg blood circulation disorders caused by soreness, but also need to consider the possibility of disease factors: 1, soft tissue strain: long-term sedentary will make muscle, ligament, fascia, joint capsule and other soft tissue has been in a state of tension, when standing up may cause muscle stretch injury, can be manifested as thigh muscle weakness, strain, soreness and local pressure pain, etc.. Usually need to correct body posture, can also apply massage, massage and other ways to relieve symptoms; 2, leg blood circulation disorders: the human body in a sitting position, the blood circulation of the lower limbs slowed down. If the thighs around the thighs are also subject to significant compression, such as warping, can lead to muscle spasm, congestion and edema of the thighs, the formation of sterile inflammation, while lactic acid, carbon dioxide and other acidic products will accumulate in the thigh muscles, producing thigh pain. At this time, attention should be paid to appropriate activities, after a period of soreness can be relieved; 3, disease: long-term sitting can induce peripheral nerve-related lesions, such as in the process of long-term sitting, may induce the original lumbar disc protrusion or sciatica aggravation, at this time around the thigh may produce a sore feeling.