I AM SOMETHING PEOPLE LOVE OR HATE. I CHANGE PEOPLES APPEARANCES AND THOUGHTS. IF A PERSON TAKES CARE OF THEM SELF I WILL GO UP EVEN HIGHER. TO SOME PEOPLE I WILL FOOL THEM. TO OTHERS I AM A MYSTERY. SOME PEOPLE MIGHT WANT TO TRY AND HIDE ME BUT I WILL SHOW. NO MATTER HOW HARD PEOPLE TRY I WILL NEVER GO DOWN. WHAT AM I?