Cherry angiomas, also known as red spots or Campbell de Morgan spots, are benign harmless, but permanent overgrowth of skin blood vessels. They tend to increase in size and number with age, and often have no cause. One study showed 75% of people at the age of 75 have at least 1. Occasionally, they can be secondary to hormonal changes.
They are typically not a cause for concern unless they are changing size, shape, or are bleeding frequently. If this occurs see your local doctor for an assessment.