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.
Hourly Forecast Detailed. 1  0am:The Lancaster, MA forecast for Aug 14 is 73 degrees and Cloudy. 2  3am:The Lancaster, MA forecast for Aug 14 is 64 degrees and Mist. 3  6am:The Lancaster, MA forecast for Aug 14 is 63 degrees and Partly cloudy. 4  9am:The Lancaster, MA forecast for Aug 14 is 72 degrees and Overcast.