Maybe from something he ate?

He will be 10 months next week and yes he eats baby food!

How old is he, is he eating baby food?

No runny nose but is teething. These babies are so confusing lol doesn't seem to phase him at all!

Has he had a runny nose? He looks so happy! I mean if he's been rubbing it a bunch from spring pollen allergies that could make sense. Or if you've been blowing it a lot for him... if not I'd take him in to the dr to see their opinion.