SUDDEN HEARING LOSS means the rapid onset of hearing loss, which , might develop instantaneously , overnight , or over the course of few days. the Heraing loss is usually Unilateral , but it can be Bilateral and ant Degree of Severity is possible. It is almost accompained by Tinnitus , and a feel of pressure , fullness and vertigo is also present . The causes of Sudden Heraing loss include Viral infection, Cochlear blood supply interferance, Blood disorder , Acoustic tumors, Acoustic trauma , Meniere's disease, Ototoxic drugs. SUDDEN HEARING LOSS is difficult to project because it depends on the cause and symptoms. some of the losses resolve spontaneously . some cases are resolve through amaedical and surgical treatment.