As you may imagine, birthmarks get that name since they most often form before or shortly after birth. Abnormal cell development in the skin can result in this accumulation of blood in a localized area, and thus comes the spot. From stork bites (a flat pink area that disappears in months) to port-wine stains (more permanent and purplish), some stay with us forever while others fade. Do these sound familiar? My pal PetSugar served as our model of her slowly fading strawberry mark from babyhood to the present day.