Rash after strep throat: what to know

Strep throat can present with a fine, rough-feeling rash that begins on the chest or trunk and may spread; this pattern is often called scarlet fever. A rash can also follow a new antibiotic, especially when it is itchy or widespread. Viral throat infections may look similar and can produce skin changes too.

The condition presents with its own combination of throat pain, fever, swollen glands, and skin findings, but a rash does not prove which germ is responsible. A clinician may review the throat, skin, recent test results, and medicines.

Contact a GP or clinic if the diagnosis was not confirmed, the rash is spreading, or the sore throat and fever are returning. Keep drinking fluids, rest, and avoid sharing cups or close face-to-face contact while an infectious throat illness is being considered. Follow prescribed [Antibiotic Treatment](/treatments/medical-management/antibiotic-treatment/) exactly unless a clinician tells you to stop.

Do not use leftover antibiotics or apply a new cream over the whole rash without advice. Note the first day of the rash, its texture, itch, and any peeling, and take a photograph.

Seek urgent help for trouble breathing or swallowing, drooling, severe weakness, swelling of the face, or rapidly worsening symptoms. Get prompt assessment for purple or bruise-like spots, blisters, peeling skin, or sores involving the mouth or eyes. A child who is unusually sleepy, not drinking, or passing very little urine needs urgent medical attention.

Ask whether the rash fits strep-related scarlet fever, a drug reaction, or a viral illness; whether testing is needed; and whether household contacts need advice. You can also ask how long to stay away from school or work.