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I received a tip a while back that an allergy to milk can cause circles under the eyes.
Whether thats credible or not, Im not sure. I decided to get an allergy test, since I've never had one, to see if theres any link between allergies and circles under the eyes.
So I go for the test. The test I had they pick you 40 or so times on your back with a various substances that cause allergies, and a needle.
The test revealed that I was allergic to dust, pollen, mold, among a couple other minor things.
The allergy doc told me that allergies can cause sinus congestion, which...yup...causes dark circles under the eyes. He said that I problly havent noticed that I had sinus congestion because I've gotten used to it over the years.
They can administer a shot every so often to combat allergies, or you can take allergy meds like Dristan to help relieve your symtoms.
Personally, I havent taken any allergy meds so Im not sure if that would help with the circles, but atleast now I know whats causing them.
If you are unsure what may be causing them, this may be your answer.
Summary An allergy test revealed to me that I was allergic to a few different things, which the doctor says causes nasal congestion. A side effect of the nasal congestion is dark circles under the eyes.