When you first pop a peppermint candy or a peppermint leaf in your mouth, the sensation of your sinuses clearing is almost instantaneous. Bronchial congestion is characterized by clogged respiratory tracts and sinuses, but peppermint is an age-old remedy for this condition. Peppermint is also an immune system booster, so if the bronchial congestion is a secondary symptom of some other ailment, this easy-to-find herb can also fight off that infection. Peppermint tea can be drunk 1-2 times per day, or you can rub a diluted amount of peppermint oil on your throat and chest before going to sleep.