Tear staining is the result of a candida yeast infection caused by excess tearing. Excess tearing can be caused by environmental irritation, entropian eyelids, and allergy. Since yeast loves dark and moist places, the channels under the eyes are a prime environment for yeast to move in and set up camp.
An individual who's been in boxers since she was in diapers recommended Lotrimin cream (brand name is Monistat 7 :lol: ). Since human vaginal yeast infections are caused by the same yeast, it makes sense that this type of antifungal would work for this application as well. She told me to rub a bit in the channels 2 to 3 times per day. Results can be seen within a few days.
Just be careful not to actually get it in the eyes.
Hope this helps!