Can atopic dermatitis cause post-inflammatory hyperpigmentation?

Post-inflammatory hyperpigmentation is extra colour that remains after skin inflammation or injury. During an atopic dermatitis flare, immune activity can disturb the skin barrier and trigger pigment changes. Scratching adds further irritation and may prolong the inflammation. The resulting mark can be brown, grey, or darker than the surrounding skin, depending on your natural skin tone and how deep the pigment change is. It is different from an active rash, although both can appear together.

The first step is preventing new flares: use the prescribed anti-inflammatory treatment, moisturise regularly, and keep nails short to reduce scratching damage. Choose gentle, fragrance-free cleansing and protect exposed skin from sunlight, which can deepen uneven colour. Do not scrub the marks or start strong acids and lightening agents while eczema is active. A dermatologist can decide whether a pigment treatment is suitable once the skin barrier is calm and can tailor it to your skin tone.

Book an assessment if marks keep appearing, the rash is difficult to control, or the colour changes without a preceding flare. Seek prompt medical attention for spreading redness, warmth, pain, pus, fever, or rapidly worsening irritation, which can indicate infection. A changing dark patch that does not behave like your usual eczema also deserves examination.

Ask how to distinguish post-inflammatory hyperpigmentation from active eczema, whether your current products are irritating the skin, and which options could improve persistent marks without triggering another flare.