Types of birthmarks. There are two main types of birthmarks: Vascular birthmarks are caused by incorrectly formed blood vessels in your childâs skin. Examples include: 1  infantile hemangiomas: the most common vascular birthmark, it usually appears within one to two weeks of birth.ypes of birthmarks. There are two main types of birthmarks: Vascular birthmarks are caused by incorrectly formed blood vessels in your childâs skin. Examples include: 1  infantile hemangiomas: the most common vascular birthmark, it usually appears within one to two weeks of birth.
Winds S at 5 to 10 mph. Chance of rain 40%. Evening: Partly cloudy. Low 36F. Winds WNW at 10 to 15 mph.
The warmest day over the next 14 days in Boston is forecast to be 9th October at 22Â°C (72Â°F) and the warmest night on 8th October at 13Â°C (55Â°F). The average temperature over the next 14 days is forecast to be 18Â°C (64Â°F) and there will be 9 days of sunshine.