Tinnitus is a disorder where sounds from inside the body are heard. Age related disorders, middle ear infection, build of ear wax, otosclerosis and inner ear damage can cause this disorder. Hearing sounds like humming, hissing and buzzing sounds are symptoms of tinnitus. Counseling, sound therapy, cognitive behavioral therapy and tinnitus retraining therapy are treatments for this disorder. Insomnia and depression can occur in severe cases.