Hydroquinone causing peeling?

I just started using hydroquinone on a hyperpigmentation spot on my forehead three days ago, using it once every night like my dermatologist directed. I did use it a while ago; about 3 years ago, and now I am back on it again. After the third time of applying it to my forehead, my skin has started to peel and it is revealing a layer of pinkish red skin. Is it normal that my skin is peeling or is it a cause for concern?

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