What should you know about limb cellulitis?

Bacteria can enter through a cut, crack, ulcer, bite, surgical wound, or fungal infection between the toes. The affected limb may become hot, tender, swollen, and increasingly red; the edge can expand over time. Fever or feeling unwell may occur. Athlete’s foot, diabetes, lymphatic swelling, and previous cellulitis can increase concern, but a clinician must distinguish cellulitis from other causes of a red or swollen limb.

Cellulitis is not the same as a superficial irritation. Without appropriate treatment, infection can spread into nearby tissue or the bloodstream.

Arrange same-day medical assessment for a new, spreading, painful, or hot area on an arm or leg. Treatment commonly involves prescribed antibiotics, chosen according to the examination and the suspected bacteria. Take the medicine exactly as directed and complete the prescribed course unless the prescriber changes it.

Rest and elevate the limb when practical, drink fluids if you can, and avoid squeezing, scratching, or massaging the area. Marking the edge of redness can help show whether it is expanding, but it does not replace review.

Seek emergency help for confusion, faintness, breathing difficulty, a very fast heartbeat, severe weakness, rapidly spreading redness, severe pain out of proportion to the skin findings, or purple or blistered skin. These can signal a serious complication such as sepsis or a deeper infection.

Contact the prescriber if symptoms worsen, fever develops, or the limb is not beginning to settle after treatment starts. People with diabetes, poor circulation, immune suppression, or a leg ulcer should seek advice promptly.

Ask what may have allowed bacteria through the skin, how soon improvement should begin, which symptoms require urgent review, and how to prevent another episode. Ask whether athlete’s foot, an ulcer, or diabetes needs separate care.