Arm Hives: Causes, Triggers and Treatment
Hives on the arms often appear when the skin is exposed to heat, cold, friction or allergens. They may start in one spot and spread to other areas.
Common Causes of Hives on Arms
- Heat or exercise. See cholinergic urticaria
- Scratching or rubbing
- Allergens like foods or medicines
- Sun exposure. See solar urticaria
- Infections
Tracking Your Triggers
Note when welts appear: after showers, workouts, particular foods, or while wearing certain fabrics. This helps your doctor narrow down the cause.
Relief and Self-Care
- Cool the area
- Wear loose sleeves
- Avoid scratching
- Take a non-sedating antihistamine as directed
When to Call 911
Call 911 right away if hives or swelling occur with difficulty breathing or swallowing, a tight or closing throat, a swollen tongue, lips or face, wheezing, faintness, or a sudden feeling of impending doom. Use an epinephrine auto-injector first if one has been prescribed to you, then call for emergency help.
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. Patients with hives on the arms can book an online or in-person consultation at Dr. Tiffany Young’s Hives Treatment Center in San Francisco.
Related Reading
You may also find these guides helpful: where hives appear on the body and hives symptoms.
Frequently Asked Questions About Hives on Arms
Why do I get hives on my arms only?
Friction, heat or exposure often affects arms first.
Are arm hives allergic?
Sometimes. Timing helps decide.
Can I exercise?
Mild cases yes, but stop if hives or dizziness appear.
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.
