Pitted keratolysis and Fucidin: what to know

Pitted keratolysis is associated with bacteria breaking down the outer layer of sweaty, softened skin. This can produce tiny pits, a pungent odour, and changes on weight-bearing areas of the sole. Similar-looking changes can have other causes, so using an old tube or treating a presumed diagnosis without an examination may delay the right care.

Fucidin is a brand associated with fusidic acid, a topical antibiotic. Whether it is suitable depends on the appearance, location, previous treatment, allergies, and local prescribing advice. It should not be shared, saved for a future rash, or used longer than directed.

If Fucidin has been prescribed, apply it exactly as instructed and wash your hands before and after application. Keep the area clean and dry, change damp socks, and allow shoes to air between uses. Do not cover the feet with airtight material unless your clinician tells you to do so. Stop and seek advice about a new rash, worsening irritation, or suspected allergy.

A broader plan may include managing sweating with [Prescription Antiperspirant](/treatments/medical-dermatology/prescription-antiperspirant/) and learning about [Topical Antibiotic Therapy](/treatments/medical-dermatology/topical-antibiotic-therapy/).

Contact a clinician if the diagnosis is uncertain, the affected skin is painful or cracked, or there is spreading redness, swelling, pus, or fever. Review is also sensible when symptoms persist after the prescribed course or return soon after it ends. Do not switch to another antibiotic without guidance.

Is Fucidin appropriate for the suspected bacteria and skin area? How should I apply it, and what changes would mean I should stop? Do I need a separate plan for sweating, footwear, or a possible fungal condition?