How to get rid of the pimples on your chin and prevent them?PLEASE HELP!!?

See a doctor, you can be prescribed a free treatment depending on your country. Maybe ask for a cream called Duac. Not sure if it can be bought in shops but it helps a lot of teenagers fight acne. I use it and I can honestly say it'd pretty amazing how fast it works. If that's not for you also try Garnier PureActive facial scrub alongside drinking a lot of water.

This stuff is awesome: http://www.desertessence.com/skin-type/oilycombination/blemish-touch-stick You can find it in health food stores or health sections of regular stores. Alternatively, you can use witch hazel and tea tree oil with great results. One part tea tree oil to about 6 -8 parts of witch hazel mixed and dabbed on your blemishes with a Q-tip of cotton ball. Don't get tea tree oil directly on your skin without diluting it first. You can pre-mix it and put it in a small container. I take the rolling ball top off of my desert essence blemish stick and pour my mixture into that. Works great!