What should you know about viral skin rash?

Viral rashes may appear as flat or raised spots, small blisters, or broad areas of redness. They can spread over the trunk, face, arms or legs, and some are itchy while others feel tender or cause no skin sensation. Fever, tiredness, sore throat, cough, stomach upset or swollen glands may provide useful context.

A rash alone cannot identify the virus. Irritation, allergy, fungal infection and inflammatory conditions can look similar. Contact Dermatitis, Heat Rash, Ringworm and Scabies are examples of other explanations a clinician may consider. A new medicine can also cause Drug Rash, which deserves prompt medical advice.

Take a clear photograph in good light and record when the rash began, where it started, whether it is spreading, and any recent illness, medicine, product, travel or contact with someone unwell. Keep the skin cool, wash gently, avoid scratching, and use loose clothing. Do not share towels, razors or clothing until an infectious cause has been assessed.

A pharmacist or clinician can advise whether you need an examination or testing. Avoid starting steroid creams or antibiotics without guidance because they may alter the appearance or be unsuitable for the cause.

Seek urgent help for trouble breathing, swelling of the lips or tongue, faintness, confusion, a rapidly spreading rash, severe pain, skin peeling, or purple-red spots that do not fade when pressed. Prompt assessment is also sensible with high fever, dehydration, eye involvement, mouth sores, or a rash in a newborn or someone with reduced immunity.

Arrange a routine appointment if the rash persists, keeps returning, becomes infected-looking, or its cause is unclear. Bring the photograph and a list of medicines and supplements.

Ask: Which features suggest infection rather than irritation? Do I need a swab, blood test or other examination? Should I avoid work, school, swimming or close contact? What can relieve itching safely, and which changes would require urgent review?