We often have children who come to the clinic and say they have knee pain, and every once in a while they will have this performance, rubbing it, resting and relieving it, examining the child’s knee joint without localized redness, swelling, heat and pain, while moving freely. Growing pains are usually pain around the knee joint or on the front side of the lower leg, and there is no history of injury. Growing pain is generally considered to be due to the child’s high activity level, the growth rate of bones is relatively fast, while the growth rate of muscles and ligaments is relatively slow, which leads to muscle and ligament being stretched and causing pain. Therefore, growing pain is a physiological pain. When a child continues to complain of knee pain and the knee joint is completely normal through a radiograph, the diagnosis of growing pain is basically confirmed. Once the diagnosis is confirmed, pay attention to getting your child more sunlight and taking proper vitamin D and calcium supplements. In addition to the common growing pains, trauma, infection, tumor, synovitis, arthritis, etc. may cause knee pain in children, but the knee area in the above cases will often appear red, swollen, hot and painful, or even deformed, etc. When there are these manifestations, we should pay attention to actively do the relevant examination and confirm the diagnosis as soon as possible. Therefore, in general, children with knee pain, as long as there is no local redness, swelling, heat and pain, does not affect the child’s activities, mainly consider growing pain, strengthen nutrition, appropriate calcium supplementation, pay attention to rest, the symptoms can disappear quickly.