Gooey eye

Babes has suspected conjunctivitis. His right eye started out looking a little tiny bit goopy this morning and by this evening the whole bottom lid was lined with yellow..stuff. We’ve been cleansing it with salt water on cotton pads etc but he seems like his usual happy self so I don’t think it’s bothering him.

Not sure if it’s more of a conjunctivitis thing or if maybe he’s rubbed food in there (he’s a smearer!) and it’s irritated it or maybe a blocked duct. Do any of these need Doctors attention or will they just suggest cleaning it like we are? He’s 9 months old, if that makes a difference.