There are many factors that can cause pain at the base of the thigh, including periprosthetic and soft tissue aseptic inflammation, soft tissue injury, infection of the tissues of the lower limb, the presence of tumours in the lower limb, joint pathology, lumbar disc herniation, iliotibial bundle friction syndrome, traumatic injury to the thigh from a fracture between the femoral trochanter. If the pain is severe or persists without relief, prompt medical attention is recommended.