Antibiotics for a foot infection

A clinician may need to examine the skin, nails, wound and circulation before choosing a medicine. Antibiotics do not correct an abscess, retained foreign object, dead tissue or poor blood flow, so another procedure or wound treatment may also be needed.

Bacteria can enter through a cut, blister, cracked skin, ulcer or an ingrown nail. Redness, warmth, swelling, pain, pus or an unpleasant smell can accompany infection. Fungal conditions can also affect feet, but antibiotics do not treat fungi.

The assessment is especially important when diabetes, reduced sensation, immune suppression or poor circulation is present. These problems can hide pain, slow healing or allow an infection to extend into deeper tissue.

Arrange a medical assessment for spreading redness, drainage, a deep wound or an injury that is not improving. Take a prescribed antibiotic exactly as directed and do not use leftover tablets or someone else's prescription. Tell the prescriber about medicine allergies, pregnancy, kidney problems and other medicines.

Keep the area clean and follow the dressing and weight-bearing advice you receive. Do not cut into the wound or try to drain it yourself. If a sample is taken, the result may help the clinician adjust treatment to the bacteria found.

Seek urgent care if redness is spreading quickly, pain or swelling is severe, red streaks travel up the foot or leg, or you feel feverish, shivery, faint or confused. Black, grey or numb skin, a foul-smelling wound, visible deep tissue, or a rapidly worsening ulcer also needs immediate assessment.

Contact the treating service promptly if symptoms worsen after antibiotics start, you cannot keep the medicine down, or you develop facial swelling, breathing difficulty or a widespread blistering rash after a dose.

Ask whether the infection is confined to the skin or may involve an abscess, joint or bone; whether a wound sample or imaging is useful; how to dress and protect the foot; and which changes should trigger reassessment. If you have diabetes or circulation problems, ask about pressure relief and foot-care follow-up.