What is this dark line on my face and how do I get rid of it? (photo)

Thank you for the photo. It may is difficult to determine the cause of the dark line of your face without reviewing your medical history. Dark lines can be birthmarks or appear from trauma, sun exposure, wrinkles/depressions in the skin, hormones, medications, or a number of other causes. For the best treatment options, it is important to visit an expert for an in-person examination. Hope this helps!