Soreness above the left hip and between the waist may be caused by gluteal myofasciitis, ankylosing spondylitis, rheumatoid, herniated lumbar disc, etc. 1. Gluteal Fasciitis: When overworked, it can lead to aseptic inflammation of the gluteal muscle, which is due to high intensity contraction and diastole of the muscle, and metabolic wastes can not be transferred in time. Chronic inflammation of the fascia over the gluteal area occurs, and soreness occurs when bending over or catching a cold. 2. Ankylosing spondylitis: mostly in the morning when the back pain aggravates the situation, may appear above the left buttock and the waist between the pain, the specific cause is not certain, may be related to autoimmune disorders and so on. There will be obvious morning stiffness phenomenon, that is to say, the symptoms are obvious in the morning when you get up, and the symptoms are relieved after activities. 3. Rheumatoid: When rheumatoid occurs, it will be accompanied by spinal pain. When bending over, there are symptoms such as soreness between the upper left hip and the waist, which is related to autoimmune disorders and streptococcal infections. 4. Herniated lumbar disc: the herniated disc tissue stimulates the left side nerve root will appear lumbar pain, there will also be soreness and pain on the upper side of the buttocks, some patients may even appear gluteus maximus muscle atrophy. When there is a soreness between the upper left buttock and waist, we should pay attention to it, consult a doctor in time, and follow the doctor’s instructions for examination and treatment.