Your lips, tongue, gums, ears, nails, and skin may turn blue too; this can appear grey on darker skin tones. In cases of cyanosis, your skin will usually be at a normal temperature.

Blue lips are sometimes associated with extreme cold and can be worrying. The NHS says that cyanosis, which is when your lips turn blue or grey because you’re not getting enough oxygen, is potentially ...

My friend did not yell, or even say much, but she got so stressed that her lips turned blue. And I mean both lips turned a deep, dark blue -- nearly black. That scared me then and still does now.

Blue lips are sometimes associated with extreme cold and can be worrying. The NHS says that cyanosis, which is when your lips turn blue or grey because you’re not getting enough oxygen, is ...