What to know about troubling hyperpigmentation

Darkening is often gradual and may follow acne, eczema, friction or another inflammatory episode. Treatment choice depends on the cause, pigment depth, skin tone and whether the trigger remains active.

Skin can make or retain extra melanin after inflammation. Sunlight and visible light may deepen existing marks, while picking, harsh scrubs and irritating products can prolong the cycle. Hormonal patterns and medicines can also influence pigmentation.

Colour alone does not identify the cause. Distribution, borders, texture, timing and symptoms such as itch or scale help a dermatologist separate post-inflammatory marks from melasma, contact reactions and individual lesions that need closer examination.

Use broad-spectrum sun protection, shade and protective clothing consistently. Choose a mild cleanser and moisturiser, introduce active products cautiously, and stop anything that causes persistent burning, swelling or peeling. Treating acne or dermatitis can prevent new marks from forming.

A dermatologist may discuss topical lightening medicines, a chemical peel, light-based treatment or laser treatment after assessing the pigment pattern and skin type. Procedures can worsen discolouration when poorly matched or overly aggressive, so treatment should be individualised rather than selected from photographs alone.

Arrange a dermatology visit for a new patch with an unclear cause, widespread darkening, or pigment accompanied by another symptom. A single spot that changes in size, shape or colour, develops an irregular border, bleeds, crusts or does not heal should be examined promptly.

Get help sooner if a product or procedure causes blistering, marked swelling, severe pain or skin breakdown. Stop the suspected product while awaiting advice and protect the area from light.

Ask what type of pigmentation is present, whether inflammation is still active, which treatment carries the lowest irritation risk for your skin, what changes would signal a poor reaction, and how your routine should be adjusted between procedures.