Nasal congestion ... simple, let my brother teach you. My mother is a doctor, and I have some research in this field. Your nose can be divided into several aspects: inflammation, cold, nasal mucosa damage, bacterial invasion, and so on. If you want to clear your nose, I'll give you a few drops that are temporarily feasible but unscientific: you have toilet water, all-purpose analgesic cream and cool oil at home ... Well, put a little around your nose, as long as you don't wipe it off, you can temporarily ventilate it and stop blocking it! ! ! Biology is easy to improve. Read more pictures, synchronize test questions with books, review experiments, master basic knowledge and review more. The most important thing is: be interested in biology! ! ! ! Thank you!