In teen age the problem of pimple is common, as it is boys or girls. here are some tips to avoid pimple or to get rid of pimples: -
To avoid pimple you should apply black sand which are available in feilds , it will provide coolness and your pimple will be finished.
you can also use aloevera get over pimple to keep it cool so it will not give pain and will be clear soon.
you should daily clean your face with water before sleep. also wash your face 4 to 5 times a day to avoid pimples.
you must use scarf or any cloth to cover your face when you go out because sunlight, dust and pollutants also causes pimples.
you can also clean your face with milk daily in night. as you can take a little amount of milk and some cotton and then apply milk on your face with the help of cotton and then rinse with water. it will help you to get rid of pimples.
you should use neem and aloevera face fash and turmeric face pack to avoid pimples.