When you have a cold or rhinitis or sinusitis, you often have some nasal snot, which can cause nasal obstruction if you don’t blow your nose, but there are rules for blowing your nose, and you can’t blow your nose hard, because this can easily cause snot to enter the middle ear cavity through the Eustachian tube and cause middle ear infection, especially in children, because the Eustachian tube is shorter, flatter and wider in children than in adults. If not treated in time, it can easily cause perforation of the eardrum, pus in the ear, hearing loss, and then turn into chronic suppurative otitis media with recurrent attacks. This shows that cold and rhinitis are the main causes of otitis media. The possibility of otitis media complications is further aggravated by incorrect nose-blowing methods. So, how to blow your nose correctly? In fact, it is also very simple to blow the left nose with the right finger pressing the right wing of the nose (basically blocking the right nose), and vice versa with the left finger pressing the left wing of the nose (basically blocking the left nose). Can not pinch both sides together to blow (generally people are used to this), there is another way is to breathe back into the mouth and throat and then spit out (a little more disgusting).