When Should You See a Doctor About Dark Patches on Skin?

Skin can darken after inflammation, sun exposure, hormonal changes, friction, or a surface infection. Post-inflammatory hyperpigmentation may remain after acne, eczema, a burn, or another injury has settled. Melasma often affects larger areas of the face, while sun spots are linked with cumulative exposure. Tinea versicolor can alter colour and may also cause fine scale.

The shade and pattern do not establish a diagnosis. A clinician considers the location, texture, border, symptoms, recent rash, medicines, and changes over time before recommending treatment.

Take photographs in the same lighting and note when each patch appeared, whether it followed a rash or injury, and what products touched the area. Use gentle skincare and sun protection, and avoid picking, bleaching mixtures, or strong exfoliants that can deepen irritation. Arrange a routine review if the patch persists or continues to spread.

Read about [Hyperpigmentation](/conditions/hyperpigmentation/) and [Post-Inflammatory Hyperpigmentation](/conditions/post-inflammatory-hyperpigmentation/) to understand common patterns, but use an examination to identify the cause.

Seek prompt assessment for a patch that changes quickly, bleeds, crusts, becomes painful, forms an ulcer, or has an irregular evolving border. Also arrange timely care for widespread darkening with significant itch, scale, fever, or feeling unwell. A new medication or product should be mentioned, particularly if the change began soon afterward.

Ask what pattern the examination suggests, whether a test is needed, how long improvement may take, and which ingredients are safe for your skin tone. If treatment is being considered, ask whether a Chemical Peel or Skin Brightening Treatment could worsen irritation or leave more pigment.