The Swab is sterile and safe to use. Gently insert the entire absorbent tip of the swab (usually 1/2 to 3/4 of an inch) into your nostril (Note: With children, you may not need to insert the swab as far into the nostril.). You may experience some discomfort when swabbing your nose, but this is to be expected. Do not insert the Swab any further if you experience sharp pain.