What's the difference between a birthmark and a mole? How to tell?

Mole, on each of our skin, on each of our skin, and more than one, some in the light, some in the dark. Mole is a common skin disease, which develops slowly and generally does not have symptoms.

Irregular birthmarks, such as OTA nevus, Eton nevus, Mongolian spots and congenital pigmented nevus, brown birthmarks, etc. It can also be shown as reddish, bright red or even crimson telangiectatic patches; It can also appear as a brown birthmark on the skin.