I faced this problem earlier, and it was horrible!
Here are a few things you can do and possibly get rid of those "deadly" problems:
1. Drink a lots of water, 12-15 glass a day (atleast).
2. Clean your face more often, don't just wash it with facewash/cleanser, also apply some astringent. The excessive oil of our skin which produces pimples will be gone by astringent.
3. Keep your scalp always clean of dust/dandruff. A dirty scalp can cause many skin problems.
4. Don't touch your face with your hands, our hands are full of germs although we don't see them.
5. Don't scrub your face when there's pimples, it will worsen.
6. Maintain a balanced diet, keep your stomach fresh, healthy and clean.
7. Don't put on too much make-up, always keep it fresh and clean.
8. Don't let your skin be exposed much under sun.
9. Keep your pillow and towel clean.
10. Keep smiling! That's the biggest medicine to any problem!