Stand for a long time on both sides of the buttocks will be sore common causes mainly include lumbar spine disease, muscle strain. 1. Lumbar spine disease: when suffering from lumbar disc herniation or lumbar spondylolisthesis, standing for a long time may cause local lumbar spine compression, which leads to aggravation of the disease, and its stimulation of the nerves when the radiating pain, which may involve both sides of the buttocks caused by soreness, at this time, you need to pass the MRI or CT scanning examination, etc., to find out the lumbar spine lesions. 2. Hip muscle strain: hip muscles are mainly used to maintain the normal position of the hip joint, when standing for a long time, the load on the hip muscle groups will be too heavy, which will lead to muscle strain on both sides of the buttocks, and symptoms of hip pain and weakness will appear. Therefore, when standing for a long time, when there is soreness on both sides of the buttocks need to be diagnosed in time, timely treatment, in daily life should also strengthen the hip and waist muscle strength training, so as to avoid producing the above lesions, induced by soreness and other symptoms.