In general, blowing your nose will not cause a perforation of the eardrum, but incorrect nose blowing combined with forceful blowing of the nose may retrogressively impact the eardrum and cause a perforation of the eardrum.
The eardrum is a thin membrane located in the deepest part of the ear canal, which is flexible and elastic. The nasal cavity and the middle ear are connected by the Eustachian tube, which regulates the pressure inside the tympanic cavity and is usually closed and only opens when yawning, swallowing or blowing the nose hard.
If both nasal passages are blown hard at the same time, if the pressure in the nasal passages is too great and travels through the Eustachian tube to the tympanic chamber, it may cause a perforation of the eardrum, which will usually result in hearing loss, earache and other symptoms.
When tympanic membrane perforation is suspected, you should go to the hospital in time, complete the relevant examinations to clarify the cause of the disease, and treat the symptoms under the guidance of the doctor.