Thigh stomach pain can be caused by physiological reasons such as overwork, trauma, sciatica and osteoarthritis. 1. Physiological reasons: such as overwork, resulting in excessive lactic acid deposition within the muscles. 2. Trauma: due to external factors leading to tissue damage to the quadriceps muscle, patients may experience pain in the lower limbs, limited mobility and other symptoms, and may experience thigh pain in the stomach, squatting and unable to get up. 3. Sciatica: such as pyriformis syndrome or lumbar disc herniation and other diseases lead to sciatic nerve compression or stimulation, the patient may appear lower limb pain, numbness, weakness and other symptoms, so may appear thigh stomach pain squatting can not get up. 4. Osteoarthritis: mostly seen in knee arthritis, hip arthritis, joint degeneration caused by patients with joint cartilage damage, the patient can appear thigh stomach pain squatting can not get up symptoms. Thigh stomach pain squatting can also have other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, give targeted treatment or treatment.