"acne has been a problem for me since 8th grade &amp; i started using differin my first day of senior year (major mistake due to it making your skin &quot;purge&quot; the first couple of days//weeks&quot; by the end of october my skin was mostly clear &amp; by the beginning of december my face was completely clear except for the occasional pimple every once in a blue moon. at the beginning it would make my skin burn especially during sports. it&#039;s sensitive to sun to defenitely use sunscreen when you&#039;re out. all around miracle medicine."