Heat rash in children is primarily caused by blockages in the sweat ducts, due to the poor development of neonatal sweat ducts, a humid and hot external environment, and prolonged bed rest. Based on the appearance of the heat rash, it can be categorized into white heat rash, red heat rash, pustular heat rash, and deep heat rash. Red heat rash can feel itchy and burning; pustular heat rash can cause burning, itching, and pain; white and deep heat rash do not typically present noticeable symptoms. When a child's heat rash feels itchy, topical medications can be applied for relief. Local cold compresses or ice packs can also be used to alleviate itchiness and pain. Naturally, providing a cooler environment for the child is beneficial, including frequent baths to help clear the sweat ducts.