My 2 1/2 year-old son woke with a black spot on his tongue this morning. It is slightly raised. As far as I know, there was no trauma to his tongue or mouth before he went to bed. It doesn t seem to be painful, or to affect his eating or drinking. He does have seasonal allergies. I gave him Benadryl last night, as well as Zarbee s mucous reducer before bed. He, also, uses a pacifier at nap and bedtime. Thank you for your time and attention.