Ear wax
Otitis externa
Eustachian tube dysfunction
Glue ear
Chronic otitis media
Otosclerosis
Barotrauma
Paget disease
Cholesteatoma
Presbyacusis
Noise-induced deafness
Ototoxic drugs – aminoglycosides
Meniere syndrome
Congenital deafness
Trauma to cochlea
Acoustic neuroma
Infections (syphilis, TB, herpes zoster)