Could Popping Of Red Marks On The Back Harmful?

Thank you. I have red marks (like birthmarks) all over my body. When i was young i notice that my mother had some and they grew in number with the years which is what is happening to me but now my daughter is saying that is also happening to her but she is only 20, i am 55. i have them in my back and since i can not see them i frequently mistake them for pimples and i botther them. is this dangerous. is this due to age?????