What should you know about pure kojic acid?

Kojic acid is used in topical products aimed at uneven pigmentation. It interferes with steps involved in melanin production, which is why it may be included in products for dark marks or an uneven complexion. Pure or highly concentrated wording does not mean a product is suitable for every face, and it does not identify why pigmentation appeared.

Irritated skin can become more uncomfortable and may develop darker marks, particularly after inflammation. A new, changing, bleeding, or persistent pigmented lesion should not be treated as a cosmetic blemish without examination.

Read the product directions and patch test on a small area before broader application. Use a small amount on clean, dry skin, keep it away from the eyes and broken skin, and introduce no other strong exfoliant at the same time. Moisturiser can support the skin barrier, while daily broad-spectrum sunscreen helps limit further darkening.

If your marks followed acne, eczema, a burn, or a procedure, ask a clinician whether the original inflammation is controlled. A dermatologist can help choose a formulation and treatment plan; information about [Kojic Acid](/materials/kojic-acid/) and [Skin Brightening Treatment](/treatments/aesthetic-procedures/skin-brightening-treatment/) can help you prepare.

Stop using kojic acid and seek advice for intense burning, swelling, hives, blistering, or a rash that spreads. Book an assessment if pigmentation is changing quickly, has an irregular border, repeatedly crusts or bleeds, or appears as a sore that does not heal. Get help sooner if eye exposure causes pain or vision changes.

Ask whether the mark has a clear diagnosis, whether kojic acid fits your skin type and current routine, how often to apply it, and what to use if irritation occurs. Ask which medicines, procedures, or active ingredients should not be combined with it.