Back Hives: Causes, Pressure Triggers and Relief
The back is a common site for hives, partly because it is hard to see and easy to irritate with straps, seats and sweat. Hives on the back can be mistaken for acne or heat rash.
Common Causes of Hives on Back
- Pressure from bra straps, backpacks and seat backs
- Sweating and heat
- Hot tubs and showers
- Allergic or stress triggers
- Laundry detergents or body washes
Hives or Something Else?
Acne has blackheads and pustules. Heat rash has tiny pinpoint bumps. Shingles is a painful, one-sided blistering rash. See hives vs heat rash.
Relief and Self-Care
- Shower lukewarm and rinse after sweating
- Wear breathable fabrics
- Use fragrance-free detergent
- Take a non-sedating antihistamine as directed
When to Call 911
Do not wait it out: hives with shortness of breath, noisy breathing, a hoarse voice, swelling of the tongue or throat, dizziness, a racing pulse, or repeated vomiting are signs of a possible severe allergic reaction (anaphylaxis). Call 911 immediately.
When to See a Doctor
See a doctor if your symptoms last more than a few days, keep coming back, cover large areas, or interfere with sleep or daily life. The Hives Treatment Center in San Francisco, founded by Dr. Tiffany Young, is a dermatology practice dedicated to hives and related conditions, and is accepting new patients.
Related Reading
You may also find these guides helpful: where hives appear on the body and hives symptoms.
Frequently Asked Questions About Hives on Back
Why do I get hives on my back at night?
Warm bedding and evening histamine rhythms may play a role. See hives at night.
Could it be shingles?
Shingles is painful and one-sided; see a doctor promptly.
Can pressure alone cause hives?
Yes, in pressure urticaria.
Get Relief for Your Hives
Hives in this area are usually treatable once the trigger or pattern is identified. Visit our hives treatment page to see the latest treatment options for your outbreak.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis or treatment. If you think you are having a medical emergency, call 911.
