If you notice these red dots on your skin, this means

Hemangiomas
: These are moles caused by abnormal growth of blood vessels. Sometimes medical intervention may be necessary, although they are usually harmless.

In conclusion, red spots on the skin do not necessarily mean that there is anything to worry about. That said, it is important to seek medical attention/consult a doctor if:

The red spots are accompanied by fever, pain or other discomfort. The spots increase rapidly in size, number or intensity. These spots are accompanied by other symptoms, such as fatigue, weakness, or dizziness.