There are many reasons for hip soreness and swelling, specifically the following: 1, long-term posture, such as sedentary, bending will lead to the local blood vessels are squeezed, the local muscle tissue blood supply is not good, resulting in the accumulation of metabolic products in the local area, causing soreness and pain, long time easily lead to strain pain. 2, lumbar spine disease, common for lumbar disc herniation, lumbar spinal stenosis, resulting in nerve compression, causing the hip area 3.Sciatic nerve diseases, such as sciatic nerve inflammation, as the sciatic nerve is the local sensory innervation nerve, sciatic nerve diseases may also cause hip soreness. 4.Lumbosacral bone and joint diseases, commonly sacroiliac joint inflammation and strain injury, symptoms are aggravated when moving more and bending over, and will be reduced when resting in bed. 5.Other diseases, such as gynecological inflammation, anal and intestinal diseases etc., may cause hip soreness and swelling. To clarify the specific cause, it is necessary to go to a hospital for examination such as MRI, etc.