From the Research
Yes, heat rash can have blisters, as the most severe form, called miliaria profunda, can present with fluid-filled blisters. Heat rash, also known as miliaria, occurs when sweat ducts become blocked and sweat is trapped under the skin. The blisters develop when sweat leaks into deeper layers of the skin, causing inflammation. Although the provided studies do not directly address the presentation of miliaria with vesicles, they discuss various skin conditions that can cause blistering, such as bullous impetigo, dermatitis herpetiformis, and bullous pemphigoid 1.
Treatment for heat rash with blisters includes keeping the affected area cool and dry, wearing loose-fitting clothing, using calamine lotion for itching, and taking cool showers. Over-the-counter hydrocortisone cream (0.5-1%) can help reduce inflammation and discomfort, as seen in other skin conditions like erythema ab igne 2. It is essential to avoid using heavy ointments or creams that could further block pores. If the blisters become infected, show signs of pus, or are accompanied by fever, medical attention should be sought as antibiotics may be necessary.
Some studies discuss the importance of distinguishing between different blistering disorders, as some can be life-threatening 3. However, heat rash blisters typically heal within a few days to a week if the skin is kept cool and the underlying cause (excessive heat and humidity) is addressed. Other studies, such as those on heat urticaria 4 and scalds caused by prolonged exposure to slowly heated water 5, provide additional information on heat-related skin conditions but do not directly address the question of whether heat rash can present with vesicles.
Key points to consider in the treatment of heat rash with blisters include:
- Keeping the affected area cool and dry
- Wearing loose-fitting clothing
- Using calamine lotion for itching
- Taking cool showers
- Avoiding heavy ointments or creams
- Seeking medical attention if the blisters become infected or are accompanied by fever.