Children sometimes get heat rash, including on their limbs, but it's usually not severe. If the rash appears on the limbs, it's often because the skin on the limbs has been in contact with the skin on the trunk or from lying on that part of the body, such as the back. During the period when a child has heat rash, it's essential to ensure that sweaty clothes are changed promptly to keep the skin dry and clean. Regular bathing is necessary, and using prickly heat powder or, depending on the child's specific situation, treating with creams under a doctor's guidance, are all acceptable approaches. Additionally, parents should avoid giving their child food that could aggravate the condition.