 [ Symptoms ] my daughter was born with a bright red birthmark on her back it is now solid & welted above the skin should i worry [ Disease ] your question cannot possibly be answered in this forum since a we do not know anything about you b we have no way of examining you and c we cannot order any diagnostic tests the only way you can get to the bottom of this is issue is for you to see a medical provider    someone that can take a detailed medical history examine you and order diagnostic tests