Our expert says:
There are many causes of this symptom. Please refer to the following link for detailed information: http://en.wikipedia.org/wiki/Periorbital_darkness
Most people suffering with dark circles under the eyes, are due to genetics but if it suddenly occured and you never had it before, rather consult a doctor for an examination and possible blood tests.
The information provided does not constitute a diagnosis of your condition. You should consult a medical practitioner or other appropriate health care professional for a physical exmanication, diagnosis and formal
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