Blowing your nose, a common action that you may not care about or may think is a bit trivial to bring up here, but do you really know how to blow your nose properly? Here are two cases. Case 1: Mr. Zhao had a cold a week ago, and his ears have been uncomfortable for the past two days, always feeling ear pain, stuffy ears and tinnitus, and when he went to the hospital, he was found to have secretory otitis media, and the cause of the disease was caused by his improper nose blowing. Case 2: Ms. Wang had a nasal endoscopy for chronic sinusitis, felt nasal congestion at home and blew her nose too hard, resulting in a swollen eye the size of a ping-pong ball and subsequent pain, and the doctor examined the woman and found that she had an emphysema in her eye and nearly lost her sight. When you have a cold, rhinitis or sinusitis, there will be a lot of secretions in the nasal cavity and you often need to blow your nose. When some people blow their noses, they like to block both nostrils and blow hard together. The nasal discharge is clean, but the ears suddenly become blocked, stuffy, tinnitus, and even painful, sometimes recovering after a few minutes, while in severe cases it can cause otitis media. What is the reason for this? It turns out that the nasal cavity is connected to the middle ear through the eustachian tube. When you blow your nose, it is driven out by strong exhalation force. Since the front nostril is small and the back nostril is large, when you pinch both nostrils and blow your nose too hard, the snot cannot all flow out from the smaller front nostril, it may pour into the middle ear cavity through the eustachian tube, and the bacteria or virus in the snot may then enter the middle ear, leading to otitis media. If you blow your nose in the above way, if the snot pours into the sinus cavity through the opening of the sinuses, it may also induce sinusitis. In addition, when you pinch both nostrils and blow your nose hard, the pressure in the nasal cavity will rise rapidly, which can easily cause damage to the mucous membrane of the nasal cavity and even cause nasal bleeding. Under normal circumstances, the soft tissues in the nasal cavity will tightly wrap the gas in the nasal cavity. Once the inner wall of the orbit is traumatized or after nasal endoscopic surgery, there will be a certain loss of local soft tissues, and blowing the nose hard at this time will cause the gas to enter the subcutaneous tissues around the eye through the gap, resulting in swelling of the eye. Once the pressure in the orbit suddenly rises sharply, the most serious case may cause blindness. Therefore, do not blow your nose with excessive force, and do not squeeze both nostrils at the same time to blow hard. So, what is the correct way to blow your nose? Press one side of the nasal cavity and blow out the snot from the opposite side of the nasal cavity; then, using the same method, clean the other side of the nasal cavity. Place a handkerchief in front of the nostrils on both sides and exhale gently and forcefully from the nostrils without pressing them, blowing the snot in the handkerchief. Sometimes, you can also lift your chin upward and draw the snot out of the back nostrils through your nose and then cough it out through the nasopharynx. However, it should be noted that no matter what method you use to blow your nose, you should not use excessive force. If the nasal cavity is not ventilated and it is difficult to blow the nose, you can first put a few drops of vasoconstrictor, such as ephedrine nasal drops, into the nasal cavity and then blow after the nasal cavity is ventilated. If the snot is too sticky to blow out, you can spray some physiological saline into the nasal cavity locally and then blow out the snot by the above method. Note: Treat primary diseases such as cold and rhinitis as early as possible so that the symptoms of excessive nasal discharge can be controlled. This article is authorized by Dr. Huang Haoran.