He's lucky! It's a darn sight better than having @#$% dry eye syndrome.
Yes, it's worth seeing a doctor, but you could take a good look at his drain ducts with a watchmaker's loop or some such. Debris in this little hole can often be lifted out much in the same way that old folk remedy styes.
I don't know if an eye surgeon would probe someone of that age, but they do clear this duct with some children.