A birthmark is simply a description of a rash of skin color change that is present at birth. Some birthmarks can dissipate, while others do not. Cyanotic birthmarks that occur on the lumbosacral region, or Mongolian spots, can dissipate with age. Erythema nevus that occurs on the face or other parts of the body does not dissipate and appears as a red spot. In the case of strawberry hemangioma, which is a type of hemangioma, it may dissipate with age. Most of them dissipate around the age of five weeks. If you are not sure what type of birthmark it is, it is better to seek medical attention in time, because early treatment of birthmarks is more effective, such as facial nevus of Ota and facial nevus of vivid redness.