My sons eyes are running green stuff and I don't know what to do for them I took him to the dr and they said it was alergies but I want to know how to get rid of it

Clean them with a warm damp cloth every so often and brush the cloth away from the eye (towards This nose for inner eye, and towards the temple for outer eye) did the doc suggest allergy meds or even check for a sinus infection? Did he check for pink eye? If so then the cloth will be about your only option. I found with my children (chronic allergy/sinus suffered) that This helps. But they are also on meds. I have one child who often gets blocked tear ducts, and it also produces the same green stuff. For This I gently massage the tear duct with the cloth after cleaning. If it continues, call the doc back or seek a second opinion. I would bet that it is bothering you more than your child though. Best wishes.

Yes, very common, warm compress can help ( warm not "hot") and clean as noted above.

I would assume doctor gave some medication for allergy, also not sure where you are at, in the area I am in, it has had some of the highest pollen counts ever.