Soreness in the right hip and right leg may be caused by muscle strain, sciatica and lumbar disc herniation. 1. Muscle strain: When the muscles of the waist and legs are overworked in daily life, it may cause muscle strain, which may lead to right hip and right leg pain. 2. Sciatica: the typical symptom of sciatica is pain in the lower back and legs, so when the right buttock and the right leg are sore, you need to consider whether it is caused by the compression of the sciatic nerve. 3. Herniated lumbar disc: If a herniated lumbar disc presses on the spinal nerve roots, it may also cause pain in the right buttock and the right leg. It is recommended to consult a doctor in a timely manner, under the guidance of a professional physician to improve the lumbar spine MRI and other related examinations to clarify the cause of the disease, and carry out targeted treatment.