To use BT21 pimple patches, start by cleansing and drying your face. Then, choose a patch that matches the size of the pimple. Peel off the protective film and gently press the patch onto the pimple, ensuring it adheres properly. Leave it on for several hours or overnight for best results. The patch will absorb impurities and promote healing. Remove it by carefully peeling it off. Clean the area and continue with your skincare routine. Repeat the process as needed until the pimple diminishes. Remember, it is important to follow the instructions on the packaging and not to pick or squeeze the pimple, as this can worsen the condition. BT21 pimple patches are a convenient and effective way to treat pimples.