I have a flaky mole on my back that was checked my a dermatologist last year. the dr said it was fine but i am questioning it. should i be concerned?

Get mole checked: Flaky skin lesions are usually harmless seborrhoeic keratoses. But sometimes they are a skin cancer. So if the lesion is changing or concerning you, return to your doctor to get it checked again. Ask for a full skin examination if you have many moles or fair skin.

For what?: What is your concern? If it would make you feel better, you could have the mole removed and submit the tissue to a pathologist for examination.

Diagnosis?: Why are you questioning? Ask the Dr to tell or send you the PRECISE DIAGNOSIS. Seborrheic keratosis? "Fine" is not a diagnosis. If you feel anxious about it, get another derm for a second opinion.