Experts say even though it is not common, lung cancer can cause skin changes - including hyperpigmentation ... Bloody Stool: Is It A Sign of Colon Cancer? Know Other Symptoms Also, a few ...

Hyperpigmentation is a skin condition that causes dark patches or spots to appear on the skin. This darkening is due to excess production of melanin — the pigment that controls skin color.

No matter your best efforts, sometimes developing (and then figuring out how to get rid of) dark spots on your face, otherwise known as hyperpigmentation ... to rule out skin cancer.