A skin rash is irritated or swollen skin because of any reason, such as heat rash or hives.

Skin rashes have many causes and vary widely in appearance.

They can affect one part of the body or a larger area.

Woman with rash on stomach

Iuliia Burmistrova / Getty Images

Some rashes clear on their own, while others require medical attention.

It causes inflammation and small, itchy, red bumps like little blisters or pimples.

During more severe skin reactions, hypersensitivity to sun exposure can occur, along with oozing blisters.

Allergic or Sensitivity Reactions

Allergic or sensitivity reactions cause an immune system response.

Blisters and oozing can occur in severe reactions.

Medications

Adverse drug interactions or drug hypersensitivity can cause anitchy rashor tender bumps and blisters.

Its said the most common bang out of drug reaction ishives (urticaria).

Anyone of any age can experience a drug reaction.

Symptoms typically resolve without permanent damage to the skin.

Many otherautoimmune skin conditionscan cause a rash.

The rash appears two to six weeks after exposure to HIV.It is itchy and painful.

Severe rash may require stronger orprescription-strength hydrocortisone or other steroid creamtreatment.

When to Contact a Healthcare Provider

Rashes can take days to weeks to heal.

While most will resolve on their own, knowing when to seek medical attention is essential to preventing complications.

Rashes have many different appearances.

Some may require medical attention.

When in doubt or emergency scenarios, consult with a healthcare provider.

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Harvard Health.Heat rash: how to spot it and what to do.

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Yale Medicine.Allergic contact dermatitis.

National Eczema Society.Infections and eczema.

NYU Langone Health.Types of drug reactions and hives.

National Psoriasis Foundation.Causes and triggers.

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