Heat rash is a common skin condition that affects people of all ages. It typically appears as red bumps or small blisters and often feels itchy, tingly, or prickly. If you’re dealing with heat rash, you might be wondering: How long will this last? In most cases, heat rash in adults will go away on its own within a few days, but recovery depends on the severity of the rash and how well you manage the symptoms. Here’s what you need to know about how long heat rash lasts, how to treat it, and when it’s time to seek professional care.
For same-day heat-related symptom relief, visit the walk-in clinic at AFC Urgent Care Denver Cherry Creek. Our team is available 7 days a week to diagnose and treat your condition with no appointment necessary. If you’d like to plan your visit in advance, simply pre-register below!
What Causes Heat Rash in Adults?
Heat rash happens when sweat gets trapped in the sweat ducts under your skin. Instead of evaporating, the trapped sweat irritates the surrounding tissues and causes inflammation. This can result in a rash that ranges from mild bumps to deeper, fluid-filled blisters.
You’re more likely to develop heat rash if you:
- Spend time in hot, humid environments
- Wear tight or non-breathable clothing
- Exercise or work outdoors in the heat
- Are bedridden or immobile for long periods
- Sweat excessively (due to exertion or illness)
How Long Does Heat Rash Last?
In most cases, mild heat rash clears up within 1 to 3 days after cooling the skin and reducing sweat buildup. The key to healing is keeping your skin cool, dry, and free of friction. However, several factors can affect how long heat rash lasts:
Mild Heat Rash
- Duration: Typically clears within 24-72 hours
- Appearance: Tiny clear or red bumps, mild itching or prickling
- Treatment: Usually resolves with basic self-care (cooling, drying)
Moderate to Severe Heat Rash
- Duration: May last up to a week or more
- Appearance: Larger, deeper bumps or pustules, can be painful
- Treatment: May require topical medication or medical attention, especially if signs of infection appear
If your heat rash doesn’t improve after 3 to 5 days of home care, or if it worsens, it’s time to check in with a healthcare provider.
When To See a Doctor
Heat rash is usually harmless, but seek medical care if you experience:
- Painful, swollen, or warm skin
- Pus-filled bumps or signs of infection
- Fever, chills, or body aches
- Rash that doesn’t improve after several days
- Symptoms that interfere with daily activity or sleep
An urgent care provider can evaluate your symptoms, rule out other skin conditions, and prescribe medication if needed.
Get Walk-In Heat Rash Treatment at AFC Urgent Care Denver Cherry Creek
Most cases of heat rash in adults are temporary and clear up in just a few days with proper care. Keeping your skin cool, dry, and well-ventilated is the best way to speed up healing and prevent future flare-ups. Are you dealing with a stubborn or painful rash? Come visit the walk-in clinic at AFC Urgent Care Denver Cherry Creek for fast, same-day treatment. Our medical team can help diagnose the cause of your symptoms and provide relief, so you can get back to feeling comfortable. Appointments are never required– simply walk-in today! We accept most health insurance plans and offer cost-effective options for self-paying patients. If you have any additional questions about the services we provide, please contact our medical team directly at (303) 692-8000.
