Fever followed by a rash in adults

Consider recent medicines, supplements, travel, insect bites, new foods, and contact with someone unwell. A viral illness may cause fever and a widespread rash; chickenpox commonly produces itchy fluid-filled spots. A localized hot, tender, swollen area is more suggestive of a skin infection such as cellulitis than a generalized itchy eruption. Respiratory symptoms may point toward an illness such as COVID-19, but skin findings are not enough to diagnose it.

Look for mouth sores, eye involvement, joint swelling, abdominal pain, or unusual bruising. Note whether the rash fades briefly when pressed, and keep the original timing clear for the clinician.

Rest and sip fluids often. Keep the skin cool, avoid fragranced products, and use a cool compress for itch. Do not stop a prescribed medicine without professional advice unless emergency services tell you to do so; report any new medicine promptly. Avoid alcohol if you feel unwell or are taking medicines that may interact with it.

Avoid close contact, shared towels, and food preparation for others if an infectious rash is possible. Photograph the rash in good light and write down the medicines and doses you have taken.

Get emergency help for difficulty breathing, swelling of the face or tongue, faintness, confusion, seizure, or a rapidly worsening rash. Seek urgent assessment for a non-blanching rash with severe illness, stiff neck, severe headache, purple or bruised-looking spots, skin peeling, or sores affecting the eyes or mouth.

Arrange same-day medical advice if the fever continues, you cannot keep fluids down, urine becomes very reduced, or the rash appeared soon after a new medicine. Higher-risk adults, including people with reduced immunity, should seek advice earlier.

Could this be a medicine reaction or contagious infection? Do I need an examination or testing? Which medicines should I avoid? What symptoms should prompt emergency care?