Medically reviewed by Renee Nilan, MD Key Takeaways COVID arm rash is a mild reaction that usually appears a week after the ...

Viral skin rashes (also known as viral exanthems) can cause itching, irritation, and pain — and possibly symptoms like fever or fatigue. Unlike allergic rashes, which happen when your immune system ...

What Causes a Rash in Your Armpit? An armpit rash is more common than you might think. Your armpits probably come into contact with more chemicals each day than most other parts of your body. Don’t be ...

Katlein Franca, MD, is a dermatologist and clinical associate professor of Dermatology & Cutaneous Surgery and Psychiatry & Behavioral Sciences at the University of Miami. Different kinds of skin ...

What causes underarm rash, and how can I care for it? Every part of our body deserves moisture and care — especially sensitive spots like our underarms. If you’ve ever experienced bumps, itchiness, ...

A quick sting in the arm, a little soreness, and then you're done that's how most people expect a vaccination to go. But if ...

Hyperthyroidism may present with an itchy rash, hives, or changes in skin pigmentation. Medications that treat hyperthyroidism may also cause a rash. Hyperthyroidism, also known as overactive thyroid, ...