Prickly heat, the disease, can heal on its own since it primarily results from excessive heat or blocked sweat, leading to the condition. Therefore, prickly heat can gradually heal itself if the temperature decreases, cooler weather prevails, or if one sweats less commonly. However, it is crucial to prevent infection, as if infection occurs, it is necessary to use some topical anti-inflammatory medications. Thus, prickly heat can heal on its own, but it is essential to prevent infection during this time.