What to expect from antibiotic treatment for cellulitis

Cellulitis affects deeper skin and commonly causes warmth, tenderness, swelling, and expanding redness. A clinician selects an antibiotic based on the examination, the likely bacteria, the body area involved, and your general health. Treatment may be given by mouth when illness is limited, while more serious infection can require medicine through a vein and observation in hospital.

The skin may remain red or sore for a while after treatment starts, but the direction matters. Marking the edge of redness can help a clinician judge whether it is extending. Antibiotics treat the infection; they do not immediately remove swelling caused by inflammation.

Take each dose as directed and finish the prescribed course unless your clinician advises a change. Rest the affected limb and raise it when practical to reduce swelling. Keep any wound clean and covered as instructed, and avoid scratching or applying unapproved creams. Do not use another person’s antibiotics or save unused medicine for a future rash.

Check the skin regularly for changes in colour, warmth, pain, swelling, or the boundary of redness. If the medicine causes a rash, breathing difficulty, facial swelling, or severe diarrhoea, seek medical advice promptly.

Seek urgent care if redness spreads quickly, pain is much stronger than the skin changes suggest, blisters or dark patches appear, or you develop fever, confusion, faintness, or marked weakness. Emergency assessment is also needed for swelling near the eye, breathing difficulty, or signs of a severe allergic reaction. Diabetes, circulation problems, or immune suppression can change how closely cellulitis should be followed.

Ask how soon improvement should be checked, whether you need a review after the course, how to care for the entry wound, and which symptoms mean the antibiotic needs changing. Ask whether activity, work, or limb elevation should be adjusted while swelling settles.