Seborrhoeic keratosis are frequently found on the trunk, and usually start to appear after the age of 30. They can run in families but are not infectious.
They are not a type of skin cancer and do not develop into skin cancer.
They are extremely common; almost everyone older than 50 has 1 or 2, some people have many such warts.
Seborrhoeic keratoses are harmless but they can itch and may look unsightly. Applying a moisturiser can help to soothe any itch.
Once present they usually persist and new ones often appear over the years.
