MRSA rash

MRSA can change the appearance of skin in ways that look like a rash, but it typically causes one or more raised, warm, painful red lumps — a boil, abscess, or spreading redness around a break in the skin. A true flat, even rash is more often caused by something else. The rare exception is a widespread sunburn-like rash with fever, which needs emergency care.

• Red, pink, or purplish skin that is warm to the touch
• A raised centre — firm at first, then soft as pus collects
• Yellow-white pus or drainage, sometimes with a crust
• Blurred, spreading edges rather than a sharp border
• Pain and tenderness out of proportion to the size of the spot
• Worsening over 24–72 hours rather than settling

For photographs and stage-by-stage descriptions, see what MRSA looks like.

Lesion: a single spot that grows — this is the classic MRSA presentation, often mistaken for a spider bite. See MRSA boil and staph infection vs pimple.

Spreading redness: a warm red patch expanding around a wound is cellulitis, not a rash.

Many small bumps: pus-filled spots around hair follicles are folliculitis.

Widespread red rash with fever: a rare toxin-mediated reaction. Treat as an emergency and read invasive MRSA.

• Eczema: dry, scaly, itchy patches that come and go
• Hives: raised welts that shift position and fade within hours
• Heat rash: fine prickly bumps in skin folds after sweating
• Contact dermatitis: itchy redness matching where something touched the skin
• Shingles: painful blisters in a band on one side of the body
• Insect or spider bite: often the first explanation people reach for when a boil appears

• Cover the area with a clean, dry dressing
• Wash hands before and after touching it or changing the dressing
• Do not squeeze, pop, or lance it — this can push infection deeper
• Do not share towels, razors, bedding, or sports kit
• Wash clothing and bedding on the hottest cycle the fabric allows

Treatment usually means drainage plus an antibiotic that covers MRSA — see treating MRSA skin infection.

• You have a fever, chills, or feel generally unwell
• Redness is spreading quickly or red streaks track away from it
• The area is on the face or near an eye
• There is severe pain, numbness, or dark or blistering skin
• You have diabetes, are immunosuppressed, or are on chemotherapy