Patients with hip distension and pain are commonly caused by hip trauma, pear-shaped muscle syndrome and femoral head necrosis, as follows: First, hip trauma: direct impact can cause soft tissue injuries such as hip muscles, and there will be local edema or even bleeding, resulting in increased tension within the soft tissue, and patients will have clinical manifestations of hip distension and pain. There is also the fear of sitting and resting in a flat position, only lateral rest, continuous cold compress treatment, and rest and braking, which can make the symptoms gradually relieve. Second, pear-shaped muscle syndrome: the sciatic nerve is compressed and stimulated at the lower edge of the pear-shaped muscle, which can produce symptoms of hip distension and pain, and sometimes it can also radiate to the lower limbs, such as the back of the thigh and the back and outside of the calf, and the diagnosis can be determined after electromyography examination of the lower limbs. The symptoms can be gradually relieved through physical therapy such as tui na, massage and acupuncture. Patients should also cooperate with the functional exercise of the pear-shaped muscle to enhance the strength of the pear-shaped muscle and restore the compliance of the pear-shaped muscle, which can make the symptoms relieve faster, and attention should be paid to protect the hip muscles and sciatic nerve in general. Third, femoral head necrosis: pain around the groin, hip and hip joint, aggravated by activity and relieved by rest. It can be progressively aggravated, and the pain is severe when the femoral head collapses. You should seek medical attention in time for early detection and diagnosis and treatment.