Get yourself examined by an ENT (Ear, nose, throat) specialist to know the exact cause and mode of treatment appropriate for you. I'm not sure if you mean hoarseness or complete loss of voice. If it is hoarseness, it could an inflammation of the larynx (voice box) called as laryngitis. Persistent hoarseness for several weeks and months is a cause for concern and should be checked by a specialist.
answered by P P