My daughter has what we have assumed was a birthmark since she was a baby. It is a slighty raised bumpy patch of skin ever so slightly darker than her normal skin tone. When she gets hot and sweaty it darkens and seems to raise becoming more obvious and being on her neck looks like almost like a love bite. She is now almost 9 and this has never bothered her. However in the last week I have noticed another patch just the same has now appeared on her back. It appeared itchy at first a week ago but now the itchyness has gone but this patch remains. If they are not bothering her should I take her to the doctor? Age 8 136cm about a month ago 4.5stones