What should you know about explain cellulitis?

People with cellulitis may notice an area of [skin redness](/symptoms/skin-redness/) that feels warm, tender, tight, or painful. [Skin swelling](/symptoms/skin-swelling/) can develop, and the affected patch may expand over time. Some people also develop [fever](/symptoms/fever/) or feel generally unwell. Cellulitis can begin after a cut, bite, crack, wound, or another break in the skin.

A fungal infection such as [Athlete's Foot](/conditions/athletes-foot/) can create cracks between the toes that allow bacteria to enter. Diabetes and other health conditions may affect wound healing or infection risk. Cellulitis is not the same as a superficial rash, so a clinician may need to examine its borders, warmth, tenderness, and progression.

Arrange a same-day medical assessment when cellulitis is suspected. A clinician may prescribe antibiotics and will explain how to take them. Keep the area clean, avoid squeezing or scratching it, and elevate a swollen limb when practical. Marking the edge of redness can help you notice whether it is spreading, but it does not replace treatment.

Follow the prescribed plan even if the skin starts to feel better. Tell the clinician about allergies, previous infections, diabetes, immune problems, and medicines. Do not share leftover antibiotics or use someone else’s prescription. If symptoms are severe or rapidly changing, use urgent medical services.

Seek urgent care if redness or swelling is spreading quickly, pain is severe, fever is high or persistent, or you feel faint, confused, very weak, or short of breath. These symptoms can signal a more serious infection, including [Sepsis](/conditions/sepsis/). People with [Type 2 Diabetes](/conditions/type-2-diabetes/) should have a lower threshold for prompt assessment of a new foot or leg infection.

What findings make you think this is cellulitis? Which antibiotic is suitable for me, and how should I take it? How soon should improvement begin? What should I do if the redness crosses the marked edge? Could a wound, fungal infection, or another condition be contributing?