Green mark ( oval extending horizontally)on left side of stomach looks raised. is it a serious issue. it's been there for at least 2 years ( looks big?

Needs evaluation: A green skin lesion sounds very atypical as most lesions are red, whitish, or shades of brown or black. An exception is that if there is metal against the skin it can oxidize and cause a green discoloration, often seen with a ring or bracelet. With most skin lesions, a picture is worth a 1000 words. Have a dermatologist for your family doctor check it out.

Green mark: Unusual color. We now know duration, but what about size? Is it enlarging? Raised, flat, indurated? Any soreness? And so many other questions. See your Physician or go to an Urgent Care facility to begin the diagnostic process. Face it, after 2 years it's not going away by itself.