If your acne blemishes go away while using a hydroquinone cream(2%) and then you stop using the hydroquinone cream(2%) will the acne blemishes come back?

There's a great possibility that acne or blemishes may come back especially when they went away after applying the cream. There are also other factors that may affect the reappearance of those stubborn blemishes like a change in your diet, lack of oxygen, stress, smoking and other environmental issues. Always remember to cleanse, tone, and moisturize to also avoid the reappearance of acne. Drink plenty of water too to supply oxygen not only to your brain but also most especially to your skin. If you really want to discontinue your use of hydroquinone, then go ahead but if you want those stubborn acne and blemishes at bay, you can switch to other creams that contain pimple-fighting properties that will make you blemish-free. You can apply salicylic acid to prevent your skin from breaking out. Include applying on your back to even out every part of your body.

If you've tried every product in the past and the hydroquinone is the only one that worked for you in eliminating acne, then don't stop using it to make you look flawless.