Children feeling knee pain at night might be a condition known as growing pains, which usually does not require special treatment but can be relieved with hot compresses and massage. In addition, providing nutrient-rich foods such as milk, bones, walnuts, and eggs can promote the growth of cartilage tissue. Vitamin C is also beneficial for the formation of collagen, so children should be encouraged to consume vegetables and fruits rich in vitamin C, such as green vegetables, chives, oranges, and grapefruits. Although growing pains are not a disease, if the pain is severe, children should rest more and avoid vigorous activities.