Thigh crotch pain is common in the following diseases: first, hip joint diseases, such as hip fracture, hip dislocation, ischemic necrosis of the femoral head, acetabular labral tear, etc., can cause clinical symptoms of thigh and crotch pain, while the affected limb can not normal weight bearing and walking, taking X-rays and MRI, will reveal the specific location and severity of the lesion. Second, lumbar spine lesions, such as lumbar disc herniation, lumbar spinal stenosis and lumbar spine slippage, can stimulate and compress nerves, resulting in painful symptoms in the crotch of one thigh or both thighs, accompanied by lumbar pain and lumbar spine activity restriction, and in severe cases, lower limb claudication, which can be detected by CT scan or MRI examination of the specific lesion site. Patients with thigh and crotch pain must pay great attention to early diagnosis and timely treatment in order to relieve clinical symptoms.