Pain in the front of the thigh above the knee, the following common causes: 1, quadriceps muscle damage: the muscle in front of the thigh is usually the quadriceps muscle, quadriceps muscle chronic strain or muscle acute injury, there will be pain symptoms in the front of the thigh above the knee. Long-term standing work or walking can cause chronic strain on the quadriceps muscle. And in the process of sports, such as basketball and soccer, frequent confrontation can cause acute strain on the quadriceps muscle, thus causing symptoms of swelling and pain in the quadriceps muscle, which is common in young patients; 2. High lumbar disc herniation: high lumbar disc is usually lumbar 1-2 segment and lumbar 2-3 segment, and this segment disc protrudes to the posterior lateral side, which can compress the nerve root and cause pain symptoms in the thigh above the knee joint below the groin Positive symptoms of frontal pain, along with lumbar pain and limited lumbar movement, can be seen when the nerve is pulled, and the skin pain in the front of the thigh can be significantly reduced. If the disease is prolonged, it may also cause chronic atrophy of the quadriceps muscle, resulting in weakness when walking or walking up and down stairs.