If patients experience pain in the rear hip, there are several factors as follows: 1. The most common factor is orthopedic surgery diseases, such as lumbar disc herniation, lumbar disc bulge, sciatica, sacroiliac arthritis, all of which can lead to swelling and sensitivity of the nerve roots that innervate the rear side of the hip, resulting in pain. 2. If local trauma, impact, strain, soft tissue contusion, or sprain is sustained, it can also lead to edema of the surrounding tissues, so pain in the hindquarters can occur. 3. Infectious diseases, for example, the hips are particularly susceptible to infection by bacteria, viruses, fungi, etc., when canker sores, boils and sores can appear on the hips, which can also lead to a significant increase in pain in the hips. For the above-mentioned pain, you can take certain anti-inflammatory drugs, such as cephalosporin, ofloxacin, penicillin and other drugs. Certain non-steroidal anti-inflammatory drugs can also be applied, especially suppositories administered anally are particularly effective, and indomethacin suppositories can be inserted anally, fenpropathrin can be taken orally, and fotarine can be applied locally, all of which can relieve posterior buttock pain.