What causes black spots on your lips?

Answer:
Smoking, certain medications, and coffee is what's listed here:
http://www.chacha.com/question/what-causes-lips-to-turn-black

However, in my personal experience; some illicit drugs can cause this as well (or maybe smoking causes it, and other drugs just make it more noticeable).
First answer by Wishiwasinthewater. Last edit by Wishiwasinthewater. Contributor trust: 0 [recommend contributor recommended]. Question popularity: 2 [recommend question].