Patients who feel that the pressure inside the eardrum has changed after catching a cold need to actively treat the cold, mainly because of the change in pressure in the eardrum caused by a large amount of nasal snot inside the nasal cavity. It is recommended to rinse the nasal cavity repeatedly with a large amount of salt water to rinse the snot out of the nose. At the same time, spray tretinoin nasal spray to reduce the secretion of nasal mucus, so that you can avoid blowing or inhaling nasal mucus vigorously and reduce the change of pressure in the middle ear cavity. If the nasal discharge is significantly improved, you can consider doing nose pinching and puffing to improve the pressure in the eardrum, and if necessary, you can also do eustachian tube blowing treatment to relieve the discomfort in the ear.