Hi. Hope you are good. I was also wondering the same thing. I have a port wine stain on my lip and my forehead. it's pink and gets a hot pink color at times especially when it's hot
but I was thinking that since concealer will hide it that I will not declare.On top of it all I have seven tattoos which I wont declare either since they are very well hidden;two on my back, thigh, shoulder, belly button, lower back and ribcage. I have worked in my office for the last two years and no colleague of mine knows I have tattoos but they do know about the birthmark because i don't always wear make up.A friend of mine who has been cabin crew for EK for the last 4years advised me not to declare either. Anyone who thinks otherwise kindly advice,I'd really appreciate....thanks