When you burn, you must cool the area under cold water.
You must protect your eyes from the sun with sunglasses.
You must blow your nose when you have mucus.
You must press down, in a cut, to stop the hemorrhage.
You must keep the volumen down when you use headphones.
You must drink water because it is necessary.
You must brush your teth three time a day.
You mustn't look at the sun without sunglasses.
You mustn't break the blister.
You mustn't eat sweats when you have stomachache.
You mustn't swallow mucus.
You mustn't drink little water because you can have calculus.
You mustn't cover all pores in your skin because you can die.
You mustn't touch your eyes when your hands are dirty.