Yes-dont feel shame if ever you start noticing these. everyone undergoes puberty. testicles for guys will enlarge while the breast of the girls will start to bud. all this happens because the hypothalamus of your brain sends signal to release testosterone and estrogen for male and female respectively. the thing you should be conscious of is your hygiene and how to prevent acne. here are some tips:for hygiene (dowshen, 2007)1. put on some deodorant to prevent body odor2. take a bath at least once a day to prevent oily hair3. brush teeth twice a day4. wear clean clothesfor avoiding acne (tips for preventing acne at any age, 2009)1. dont squeeze acnes2. wash pillowcase as often as possible3. pull hair away from skin4. dont go to bed wearing make-up