Age spots on lower legs: recognising different causes

Lower legs are exposed when wearing shorts or skirts, so solar lentigines can develop there. This area is also prone to pigment after insect bites, shaving irritation, eczema, minor injuries, and leakage of blood pigment associated with vein problems.

Sun spots tend to be discrete, flat, tan-to-brown marks on exposed areas. Pigment left after inflammation often matches the sites of old scratches, bites, or rashes. Rusty-brown colour around the ankles, especially with swelling, aching, itch, or hardened skin, can accompany chronic vein-related changes.

Diabetes and circulation problems may affect healing but cannot be diagnosed from colour alone. A hands-on examination helps separate pigment in the skin from bruising, vascular change, and a lesion requiring closer investigation.

Apply broad-spectrum sunscreen to exposed legs and moisturise dry skin to limit scratching. Avoid picking, aggressive exfoliation, and home freezing products. Photograph representative spots and note whether prolonged standing, swelling, injury, or a rash occurs with them.

If both ankles are discoloured or swollen, request a medical evaluation before pursuing pigment treatment. Procedures aimed only at colour will not correct an underlying vein or inflammatory problem, and compromised lower-leg skin may heal slowly.

Get urgent medical help for sudden swelling of one leg with pain, warmth, or redness, or for breathlessness or chest pain. These symptoms require prompt assessment independently of any age spots.

Arrange a skin check for a mark that grows, changes shape or colour, bleeds, forms a persistent crust, or becomes an open sore. New ankle staining with ongoing swelling, tender inflamed skin, or a wound that is not healing also warrants timely care.

Ask whether the colour is a solar lentigo, post-inflammatory pigment, or circulation-related staining. Mention leg swelling, varicose veins, numbness, slow-healing wounds, and current medicines. If cosmetic treatment remains appropriate, ask how lower-leg healing and your skin tone affect the choice.