External Signs of Internal Problems

Somes rashes — like poison ivy — are common and go away with time, but see a doctor if your rash is unusual in shape or texture, doesn’t respond to over-the-counter treatment or is accompanied by symptoms like a fever. A rash can indicate problems like a medication allergy, Lyme disease, hepatitis C or cancer. Because rashes may help you notice a problem before it gets serious or indicate diseases that have already progressed, it is important to seek medical attention for an unusual or severe rash.