An onion can also help your sinus' drainage. It is a natural decongestant. Just make some onion juice, you do this by slicing up slices of and onion and put sugar in it. 1-2 tbl spoons, let set for 1/2 hour till juice forms and spoon it out. Swallow, it is not too bad. One onion can be "juiced" many times. This is a great tip for a pregnant woman who has a cold and can't take medicine.