Decongest the Nose Sit up straight and exhale a soft breath, then pinch both nostrils shut. Try to keep your mind off the breathholding; shake your head up and down or side to side; go for a quick walk, or jump and run. Once you feel a very potent sense of air hunger, take a very slow and controlled breath in through the nose. (If the nose is still congested, breathe softly through the mouth with pursed lips.) Continue this calm, controlled breathing for at least 30 seconds to 1 minute. Repeat all these steps six times.