I have multiple pigmetenrd lines on almost all my nails. The middle finger lines are thicker and blurred, and the 2 toes, 2 little toes and index finger have thicker pigmentation than other nails. I biopsed a nail with not as much pigmentation as the ones mentioned above (my ring finger nail) .It was clear , Im 16 snd i had these from childhood (dont remember when they appeared). im also darlk skinned. Is there a need for a biopsy to check the blurred and wider pigmented nail?