I just adopted a rescue kitty that's 15 weeks. He's had all his shots and is on Advantage. However, he has black dried blood granules (similar to flea residue) under his chin and is slightly sensitive in that area. He does not have fleas because of the Advantage. Is this some sort of viral/fungal thing?
This could be flea dirt left over from fleas. Try to clean the area, if it doesn't look right to you then I recommend a vet visit. vetcare