Dina Prioste shows us how to do breath of fire with yoga in this video. Start off by sitting in a comfortable seated position on top of a blanket or pillow, with Kleenex close by. Begin by taking a deep breath and exhale, do this three times. Now, take a deep inhale in and do 15 exhalations. Do this 5 times, increasing your exhalations to 20 on the last round. Come back to your regular breathing when you are done and mucus will have been cleared from your head. You can increase your exhalations with time and practice. You can also do this breathing in different postures, depending on what you are comfortable with.