What could be the Cause of my acne?

okay so

- I am eating how I normally do, I barely eat any sugar because I have a sugar intolerance.

- I am not on any form of birth control

- I didn't switch any products that I use on my face

- I always wash off my makeup at night

and

-its been bad at all times of the month, not just near my period which is when I normally get more acne

what could cause this acne!?!?
What could be the Cause of my acne?
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