What should you know about causes of dark spots on legs?

A mark may remain after an insect bite, shaving irritation, wound, eczema flare, or inflamed follicle has healed. Sun-exposed legs can develop sun spots, while clusters of lighter or darker areas with fine scale may suggest tinea versicolor. Melasma usually follows a patterned distribution, whereas post-inflammatory hyperpigmentation follows the site of earlier irritation. These names describe possibilities; colour alone cannot confirm one.

Note whether spots are flat or raised, smooth or scaly, itchy or tender, and whether they are changing. Taking a private photo in consistent lighting can help show progression at an appointment.

Use gentle washing, moisturise dry skin, and avoid picking bites or squeezing bumps. Cover or apply broad-spectrum sunscreen to exposed legs, because ultraviolet light can deepen existing pigment. Do not use strong lightening products on broken or inflamed skin. After diagnosis, a dermatologist may consider [Skin Brightening Treatment](/treatments/aesthetic-procedures/skin-brightening-treatment/), a [Chemical Peel](/treatments/aesthetic-procedures/chemical-peel/), or [Picosecond Laser Treatment](/treatments/laser-and-energy/picosecond-laser-treatment/).

Book a skin assessment for a spot that changes in size, shape, colour, or surface, or one that repeatedly crusts, bleeds, or does not heal. Prompt care is sensible when several spots appear suddenly with swelling, pain, fever, or marked itch. A clinician can examine the whole pattern rather than treating an isolated colour change.

Ask whether the spots fit post-inflammatory pigment, sun spots, an infection, or another condition; whether any need examination with magnification; and which treatment is safest for your skin tone. Ask how long to try the plan before reassessment.