Hello,
Welcome to HCM.
Watery diarrhea with greenish stools since 12 days should be further evaluaetd even if you have problem of
lactose intolerance.
Greenish stools can also occur in various conditions like excess unprocessed bile (which is to be digested by certain enzymes)or
iron supplements,or iron rich diet,
celiac disease or Protozoa infestation etc
It is good that you have taken immodium (
loperamide) and you got relief from watery motions.However,I would advise you to continue it for 3 to 4 days more.
Also,eliminate the diet containing lactose products like milk ice cream, and cheese, bread and baked goods, cereals, salad dressings, candies, and snacks,whey, curds, milk by-products, dry milk solids, and nonfat dry milk also contain lactose.
But go for some routine blood works,ESR,stool examination and ultrasound abdomen if you have
abdominal pain or discomfort.
So,better you consult your GP or some local doctor and rule out above causes.
Regards,