What should you know about cellulitis and swelling?

In cellulitis, inflammation makes the infected area swollen, warm, red, and sore; the edge may enlarge over time. Swelling can also follow an injury, allergy, vein problem, or fluid build-up, and these causes may not need antibiotics. One-sided, painful swelling with skin change deserves examination, particularly when it began quickly. A clinician may inspect the skin, check circulation, and look for an entry point such as a crack or wound.

Seek same-day advice for suspected cellulitis rather than waiting for the swelling to resolve by itself. Keep any wound clean and avoid massage, squeezing, or puncturing the swollen skin. Remove tight jewellery near the area. Rest and elevate the limb if comfortable, but do not use compression unless a clinician has advised it. Follow the prescribed plan and note whether redness, pain, or swelling is extending.

Get urgent help if swelling spreads quickly, pain becomes severe, the skin turns dusky or blistered, or you develop fever, shaking, confusion, faintness, or breathing difficulty. Sudden swelling of the face, lips, or tongue can be an allergic emergency. A swollen leg with chest symptoms also needs emergency assessment.

Ask what is most likely causing the swelling, whether you need antibiotics, how often to check the skin, and which activities or dressings are suitable while it heals.