These are birthmarks resulting from abnormal blood vessel growth. Occasionally, medical intervention may be necessary, but they are generally harmless.

In conclusion, the appearance of red spots on the skin does not necessarily mean you should worry. That said, it is important to 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.