When the body appears hoarse phenomenon to draw attention to, if hoarse voice more than six months may be due to some cancer caused by the common causes of hoarseness are as follows: 1, vocal cord nodules, chronic laryngitis is a common cause of hoarseness, usually caused by vocal cord nodules, chronic laryngitis is due to excessive pronunciation, such as prolonged speech or shouting triggered by, if the use of improper voice, will also Persistent hoarseness can also occur if the voice is not used properly. 2, if there is a foreign body in the throat, a long cough can easily cause the voice to burn out, which leads to hoarseness. 3.If the hoarseness is prolonged and accompanied by laryngeal pain and painful swallowing, it may be caused by laryngeal nodules or malignant tumors if the treatment does not heal for a long time. 4.If the voice is hoarse for a long time, it is caused by laryngeal cancer, so you must go to the hospital for examination and timely treatment to avoid delaying the treatment and aggravating the condition. 5.If the larynx is traumatized, such as dislocation of the arytenoid joint, it will also lead to hoarseness. There are several causes of hoarseness in the throat as above. If the condition is relatively mild, it can be treated by medication, but if the hoarseness is long and serious, go to the hospital for treatment in time.