Muffled ears feel hearing loss, common causes are: 1, secretory otitis media, patients are often accompanied by chronic rhinitis, sinusitis or recent history of upper respiratory tract infections, nasal hormone sprays can be used (Nesuna, Coxsulam, Renoxolone, etc.), saline nasal sprays, mucus discharge promoter (Euroma drops or eucalyptus pinnatifida intestinal soft capsule) and oral hormone (eg, prednisone) therapy, for the conservative treatment of ineffective patients, feasible tympanic membrane puncture injection or tympanic membrane cannulation. For patients who are not effective in conservative treatment, tympanic membrane puncture injection or tympanic membrane tube placement is feasible, but it is recommended to improve the nasal endoscopy or laryngoscopy before treatment to understand whether there is any new biological growth in the nasal cavity and nasopharynx.2. Cerumen (earwax) blockage, cholesteatoma of the external auditory canal, or fungal blockage, can be removed by using the otoscope at the hospital.3. Sudden deafness, which is often more pronounced in terms of hearing loss, needs to go to the hospital to improve the pure tone audiometry, acoustic impedance and other tests, and if the diagnosis of sudden deafness, early treatment. If you are diagnosed with sudden deafness, you need to treat it as early as possible to save your residual hearing. Therefore, if there is a dull ringing in the ears, hearing loss, it is recommended to regular hospital otolaryngology consultation as soon as possible, so as not to delay the treatment.