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I have had a faint dark line in my left thumb for quite some time. I was never concerned about it until I came across an article about nail changes and health. Now I am terrified that this could be something serious. I lost this nail when I was a kid after smashing my thumb in a car door. It grew back irregular but I have never experienced the discoloration. I noticed it probably a year ago. Could this be a subungual melanoma? Can nail trauma from 35 years ago manifest as a melanoma now? What are my next steps? Should I see my PCP or go straight to a dermatologist. Any encouragement is appreciated.
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