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, PA forecast for Mar 14 is 26 degrees and Heavy snow. 2  3am:The Lancaster, PA forecast for Mar 14 is 22 degrees and Blizzard. 3  6am:The Lancaster, PA forecast for Mar 14 is 22 degrees and Blizzard.  9am:The Lancaster, PA forecast for Mar 14 is 25 degrees and Ice pellets.