Question

what are dark circles

Answer 1

Dark circles are nothing but dark patches around the eyes . They are caused due to under-sleep or it could also occur due to over-sleep.
Hope it helps

Answer 2

Heya FRNDS
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dark circles under the eyes.

Common causes of this symptom
Under the eyes, there may be due to dark circles which are not due to the underlying disease. Examples include a family history of dark circles, exhaustion, sleep deficiency, allergies, ruby ​​eyes or excessive sun exposure.
Self treatment
Applying cold compression under the eyes, raising the head during sleep and taking adequate sleep can help prevent the dark circle. Concealers and creams can also help in using.
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Thank you
@srk6