if you're breastfeeding put some breast milk in the eye like eye drops. also massage the sides of the nose towards the tear ducts

It's a clogged tear duct

it's called a tear ducts goggle.Out of my three kids had two of them.Both of them had to take the doctor because it was get better.They will gave u some eye drops and it work wonders

maybe he got air in it. lol saying it in English.