Birthmarks are dark brown or red patches on the skin that are caused by abnormal blood vessels. About one in three people have some sort of birthmark, and they can vary dramatically in size, shape, and color. Most birthmarks don’t cause any physical harm but people may feel distressed and upset, especially at school, because they are marked out as different.One in ten people develops strawberry marks, also called capillary homemaking. These appear a couple of months after birth, most commonly on the face or neck. It’s a small, red patch or lump, hence the name which will grow during the first nine months of a baby’s life. The condition does not need treatment and seven out of ten strawberry marks have disappeared by the time the child is seven years old. But some remains and people tend to cover them up with tattoos.