Hi,I Am Mayank.I Have Acne For 2 Years ..This Is

Hi,I am mayank.I have acne for 2 years ..This is happening to me for last 2 years..I live in another city but I study in some different city so I was taking medications at place where I was studying and the intensity of redness was going down but when I came to my home town the redness came to point where I started and then it took two month two lower the redness and when i came back they again became red...can u please tell me why this is happening?