There are several possible causes of left-sided hip pain: first, gluteal myofasciitis. Patients with gluteal myofasciitis can develop chronic aseptic inflammation of the hip muscles, resulting in hip pain, which should be diagnosed by relevant examinations to exclude other diseases, commonly in patients who have been cold or sedentary for a long time. Second, dermal nerve compression, when the dermal nerve in the hip is compressed, dermal neuritis can also occur and cause pain in the hip, often a palm-sized pain, pain in the skin of the dermal nerve innervation area, then the relevant examination should be performed for diagnosis. Third, pear-shaped muscle syndrome, patients with pear-shaped muscle syndrome can also appear at the pear-shaped muscle obvious pain, which is often accompanied by symptoms of sciatica, to carry out relevant physical examination and electromyography for diagnosis and treatment. Fourth, sciatic nodal bursitis, chronic inflammation of the sciatic nodal bursa can also appear in the left hip pain at the sciatic nodal area, then the relevant physical examination and nuclear magnetic examination should be carried out for diagnosis and treatment.