Medically reviewed by Susan Bard, MD Some causes of underarm rash include infection, allergic reaction, and inflammation.

It’s more than fair to wonder what’s happening if you suddenly develop a skin rash, especially if they’re not a regular thing for you. But rashes happen for a range of reasons, from products ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." It’s more than fair to wonder what’s happening if you suddenly develop a skin rash, especially if ...

A rash on the inner thigh or near the groin can be caused by close-fitting clothing, leg shaving, or situations that result ...

A sun rash — known medically as a polymorphic light eruption — is a skin reaction due to sun exposure. It may cause irritation but does not usually result in serious complications. It ...

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Poison oak rash is an allergic reaction to the leaves or stems of the western poison oak plant (Toxicodendron diversilobum). Home remedies and medical treatments can help manage symptoms.

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Lyme disease often causes a rash that can be distinctive and resemble a bull’s eye. The rash can also change over time as the bacteria spread. Lyme disease can result from the bite of a black ...