Black or dark brown spots with irregular borders
These can indicate melanoma, the most dangerous form of skin cancer.
Unlike normal moles, melanoma spots tend to grow and change shape over time.
They are often uneven in color, combining shades of brown, black, red, and even blue.
Red or pink spots that persist
Basal cell carcinoma (BCC) and squamous cell carcinoma (SCC) often appear as reddish, scaly patches or sores that do not heal.
These spots may appear shiny, crusted, or ulcerated.
BCC and SCC are less aggressive than melanoma but still require immediate treatment to prevent further complications.
Clusters of small red or purple spots
These could be signs of blood vessel problems or more serious conditions such as leukemia or Kaposi’s sarcoma, a rare cancer often associated with a weakened immune system.
If these spots appear suddenly and are accompanied by other symptoms such as fatigue or a tendency to bruise, immediate medical attention is required.
Dark Spots Under the Nails
A small black or brown spot under a fingernail or toenail that does not grow back with the nail could be a sign of subungual melanoma.
This type of melanoma is often mistaken for a bruise, but it does not fade over time.
If you notice a persistent dark spot under your nail, consult a dermatologist.
The ABCDE Rule: A Guide to Detecting Skin Cancer
One of the most effective ways to identify potentially cancerous spots is the ABCDE rule. This tip will help you distinguish harmless moles from worrisome skin changes:
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