Brown spot on tongue

  I noticed today that my 3 1/2 month old has a brown spot
  just to the left of the tip of her tongue.She seems to be breastfeeding okay.
  Do you have any ideas what it may be?
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Dear Laurie ;
A small flat spot would be similar to a skin nevus ( called lentigines or lentigo ) although this condition is more commonly seen in older children and there would be more than one lesion. consider getting a health care professional to see it during your baby