Scarlet fever blisters: what to know

Scarlet fever is associated with a rough, widespread rash and symptoms such as fever or sore throat. A clear or cloudy fluid-filled blister is a different skin finding. It can occur with viral illnesses, irritation, burns, allergic reactions, or other infections. The location, pain, crusting, mouth involvement, and timing matter. Do not assume every blister is a fever blister or that a blister confirms scarlet fever.

Do not puncture, peel, or squeeze blisters. Wash gently, pat dry, cover with a clean non-stick dressing if they rub against clothing, and wash hands after touching the area. Avoid sharing towels, lip products, utensils, or close skin contact until the cause is known. A clinician may recommend a GP Consultation and may prescribe treatment based on the examination.

Seek urgent help for blisters around the eyes, widespread blistering, severe pain, skin peeling, breathing difficulty, facial swelling, confusion, dehydration, or a child who appears very unwell. Prompt review is needed if blisters become hot, increasingly red, swollen, or filled with pus, or if fever accompanies a rapidly spreading rash.

Do the blisters fit the suspected illness, or is another diagnosis more likely? Should the fluid or surrounding skin be tested? How should the area be covered, and which warning signs should bring me back urgently?