Seborrhoeic keratoses (also called seborrhoeic warts) can often appear in those over 40 - starting as a small flat lesion they become more raised and larger as the years go by. They range in colour from pale pink to dark brown with a rough surface that gives the impression they are stuck onto your skin's surface - with some looking similar to pigmented skin tags. Typically they occur on the trunk, but are also common on the head and neck. Once present, they usually stay, and new ones often appear over the years.
Actinic keratoses (also called solar keratoses) are dry scaly patches of skin that have been damaged by the sun. They can feel dry, rough and scaly and are usually 1 to 2 cm in size ranging in colour from pink to red to brown. The patches usually appear on areas of your body that are often exposed to the sun, such as your face, hands and arms, ears, scalp and legs.