Sepsis and cellulitis: when to worry

Cellulitis affects deeper layers of skin and commonly causes a tender, warm, red, swollen area. The edge may expand, and the skin can feel tight. Athlete's foot, cracks, bites, wounds, or other breaks in the skin can provide an entry point for bacteria.

Sepsis is a dangerous body-wide response to infection. Cellulitis does not automatically mean sepsis, but a person with cellulitis who becomes confused, faint, unusually drowsy, breathless, clammy, or rapidly worse needs emergency help. Risk can be higher with conditions such as type 2 diabetes or reduced immunity.

If cellulitis is suspected, arrange prompt clinical assessment rather than waiting for the area to settle. Note when the redness began, how quickly it is changing, the location, pain, fever, recent injury, and any medicines or allergies. Keep the area clean and avoid squeezing or puncturing it.

If antibiotics are prescribed, take them exactly as directed and complete the prescribed course unless the prescriber changes it. Elevating a swollen limb may help comfort. Do not share antibiotics or use leftover medicine.

Seek emergency help for confusion, collapse, severe weakness, difficulty breathing, blue or mottled skin, or inability to stay awake. Get same-day medical care for fever, rapidly spreading redness, escalating swelling, severe skin pain, red streaking, pus, or failure to improve after treatment begins. A symptom page about fever, painful skin, skin redness, or skin swelling can help explain individual signs, but it cannot replace assessment.

Ask whether the infection needs oral or intravenous treatment, how to mark or monitor the border, what improvement should look like, and which symptoms mean you should return urgently. Mention diabetes, immune problems, recurrent episodes, and any preceding foot or skin infection.