If the nasal cavity you can get is not good, go to the hospital to find someone to use nasal endoscope and medicine. The effect is excellent. I took a lot to airports outside the United States. Liquid is allowed, but it should be put in the consignment box. As long as your liquid is not fuel, you can take it, but the total volume should not exceed 4 liters or the nasal cavity is sparse. It doesn't matter to bring a 20 version.