Children’s thigh pain may be caused by trauma, calcium deficiency, synovitis and other reasons. 1. trauma: if the child’s recent activity is relatively large, causing muscle strain and other injuries, or do not pay attention to their own protection, thighs may be traumatized, local redness, swelling, bruising, resulting in local blood circulation in the thighs is impeded, resulting in pain in the thighs, you can choose to use local hot compresses or massage to ease the way. 2. Calcium deficiency: If the child’s height development is relatively rapid, the body lacks calcium, will lead to imperfect bone development, muscle spasm, especially at night, thigh pain, daily supplementation of calcium in a timely manner, appropriate sun exposure to promote the absorption of vitamin D. The child’s thigh pain can be alleviated by localized hot compresses or massage. 3. synovitis: if the child’s resistance is relatively poor, easy to be infected by pathogenic microorganisms, will cause synovitis in the hip joint, knee joint, etc., the inflammation will stimulate the synovial membrane of the joints, resulting in pain in the thighs, then more attention should be paid to rest, and appropriate relief through exercise. If the child’s thigh pain, can not be effectively relieved, to go to the hospital in time to check, symptomatic treatment.