Up to 30% of people with chronic hives (also known as chronic urticaria) have an underlying autoimmune disease that affects the thyroid gland in the neck. Chronic hives are especially common in people ...

Enlarging purple pruritic nodules on the dorsal neck One month after a painful neck rash, an HIV-positive man develops pruritic purple lesions at the same site. A 34-year-old African American man ...

This autoimmune disease may impact your skin as well as your nails and hair. Learn what to look for to treat lupus more effectively.

Inverse pityriasis rosea usually causes a rash on the armpits, groin, neck, or face. The rash may clear up on its own, and medications such as antihistamines can help with itching. Inverse pityriasis ...

Hives are itchy red or white bumps that often stem from an allergic reaction. Some rashes are contagious, but hives are not spread from person to person. Corticosteroids and biologics can treat both ...

When a blotchy red rash pops up on your skin, it's not easy to know exactly what the cause is. With thousands of skin diseases to choose from, deciphering your skin can be a challenge. But with skin ...

We usually think of COVID-19 as a viral illness that causes respiratory symptoms, like congestion, sore throat and a cough. But, like a surprising amount of other viruses, the coronavirus can also ...