Antibiotics for cellulitis of the arm

Milder infection may be treated with medicine taken by mouth, while a person who is very unwell, cannot take oral medicine or has rapidly progressing infection may need treatment through a vein. A clinician should select the antibiotic rather than relying on leftovers.

Cellulitis is a bacterial infection in deeper skin and nearby soft tissue. It can enter through a cut, cracked skin, an insect bite, an injection site or another small break that is difficult to see. The affected arm can become red, warm, swollen and painful; cellulitis commonly presents with these changes.

The clinician may mark the visible edge of redness to track spread and examine for pus, a wound, restricted movement or swollen lymph nodes. A collection of pus can require drainage in addition to antibiotic treatment.

Start the prescribed antibiotic as instructed and complete the planned course unless the prescriber changes it. Tell the clinician about allergies, pregnancy, kidney or liver problems, recent antibiotics and medicines that may interact.

Rest the arm and elevate it on pillows when practical to ease swelling. Drink fluids, protect any broken skin with a clean dressing and check the affected area for spread. Do not massage the inflamed tissue or apply unprescribed creams to an open wound.

Seek urgent review if redness is spreading quickly, pain or swelling is intensifying, fever develops, red streaks travel up the arm, the hand becomes numb or difficult to move, or pus appears. Contact the treating service if symptoms fail to begin settling after antibiotics are started.

Call emergency services for confusion, collapse, breathing difficulty, mottled skin or extreme drowsiness. These are warning signs of severe systemic illness rather than a reason to wait for the next scheduled dose.

Ask how soon the arm should be rechecked, which side effects require a call and whether a wound or abscess needs separate care. Also discuss recurring swelling, eczema, lymph-node surgery, immune-suppressing treatment or diabetes because these details may influence management.