Acute laryngitis caused by many factors, mainly so several aspects:
1, caused by infection: is generally believed that, mainly in the cold after the first, virus attacks, there is secondary bacterial infection.
2, occupational factors: for example, production of too much exposure to dust, harmful gases, but also can cause acute inflammation of the throat. Use voice more teachers, actors and so on, such as voice improper or excessive use of vocal cords, vocal cords a higher incidence of acute inflammation.
3, tobacco and alcohol too much, cold, fatigue, leading to the body's defenses are weakened.