This is a question regarding BP usage as spot treatment rather than all-over face use. At what stage of a pimple should one stop applying BP there? Should BP be applied on the spot until completely flat and clear? Or should it be left alone once the most inflamed stage passes and the spot starts to lose color? Sometimes a pimple will surface to the yellow stage, and it would then calm down the next morning. I feel that using BP at that stage may be a waste of product, as the purpose is to kill active acne bacteria rather than heal skin tissue.