What should you know about dark spots due to sun?

Ultraviolet light can activate pigment-producing cells, leaving brown or grey-brown marks on exposed areas such as the face, hands, shoulders, and chest. Repeated exposure may make existing pigmentation darker. Flat, fairly even marks may fit [Sun Spots](/conditions/sun-spots/), while patchy facial colour can fit [Melasma](/conditions/melasma/). A skin professional also considers medicines, past inflammation, and the mark’s border and surface.

Use broad-spectrum sunscreen as directed on exposed skin, reapply according to the product instructions, and add shade, clothing, and a hat when practical. Avoid picking or harsh scrubs, which can create more pigment. Record whether a mark is flat, scaly, itchy, or changing. If it persists or bothers you, book an examination before choosing a [Chemical Peel](/treatments/aesthetic-procedures/chemical-peel/), [Skin Brightening Treatment](/treatments/aesthetic-procedures/skin-brightening-treatment/), or laser-based option.

Arrange a prompt skin review if a mark becomes asymmetric, develops an irregular edge or several colours, grows, bleeds, crusts, or remains sore. Do not cover a suspicious changing spot with cosmetic treatment. A clinician can decide whether it needs closer examination and which treatment, if any, is appropriate.

Does this mark look like sun-related pigmentation or another condition? What level of sun protection is practical for me? Should treatment wait until the diagnosis is clear, and how can irritation be avoided?