Nine-year-old children are always itchy feet scratching the skin of the causes of foot odor, mosquito bites, frostbite and so on. 1. foot fungus: due to the child’s exercise, sweating more, the feet of the sweat gland secretion exuberant, easy to trigger fungal infections or the use of foot fungus suffering from the crowd’s shoes, etc., resulting in the child also suffers from foot fungus, which leads to the child’s feet itchy, resulting in the child to scratch, skin breakage. 2. Mosquito bites: If a child’s feet are bitten by mosquitoes, it will trigger local skin itching, bags, rashes and so on, which leads to the child’s old because of itchy feet, scratching, resulting in skin breakage of the feet. 3. Frostbite: When the weather is cold, the child’s feet are not warm enough, resulting in frostbite. When entering a warm indoor environment, it will cause the local skin of the feet to appear itchy symptoms, triggering the child to scratch, resulting in skin breakage. If the nine-year-old child is always itchy feet scratching skin, it is recommended that parents take the child to the hospital in time to improve the relevant examination, to clarify the cause of the disease, and follow the doctor’s instructions for treatment.