What is the difference between heat rash and eczema?

Prickly heat and eczema are skin diseases, but there are big differences between them. For example, 1. Prickly heat mainly grows on the trunk, while eczema is mostly facial. 2. Prickly heat is mainly presented as red spots, while eczema is not only red spots, but also white or beige spots at the top. 3. Prickly heat can heal itself, while eczema is mostly not self-healing.