I got tear trough filler over 2 months ago, now underneath my eyes have swollen and become very painful. What do you advise?

Occasionally there is swelling and tenderness after injections of dermal fillers into this area.  In most cases  at 2 months  one would expect the discomfort and/or swelling to have subsided.  You should contact your provider and be re evaluated These symptoms could be indicative of an infection, allergic reaction or too superficial placement of the product.