A 2.5 mm black dot suddenly appeared on my left pinky finger (palm side) a few days ago. Could this be melanoma? (photo)

I recommend getting a formal evaluation with a cosmetic dermatologist. Moles can be removed with laser, radiowave or shave. See an expert. Best, Dr. Emer

Thank you for your question and photographs. It's difficult to tell you what type of lesion your black dot is because it needs to be evaluated in person with a dermatoscope, which allows the dermatologist to assess for any abnormal or irregular characteristics under high maginification. If any are found, then a biopsy should be performed and sent to a laboratory. I highly recommend you consult with a board certified dermatologist to have your lesion evaluated and to discuss treatment options that best suit your needs. Take care and good luck.