Laryngeal hoarseness for a month is not good, you need to do a laryngoscopy, clear diagnosis and standardized treatment in accordance with the doctor’s instructions. Laryngoscopy hoarseness for a long time is usually caused by vocal cord problems, commonly found in chronic hypertrophic laryngitis, vocal cord nodules or polyps, and throat tumors can also be caused. 1. Chronic hypertrophic laryngitis is usually caused by recurrent episodes of simple laryngitis, improper use of voice, such as teachers, shouting, singers, etc., environmental pollution, harmful gases, long-term stimulation of the mucous membrane of the pharynx, chronic inflammation and repeated stimulation of the mucous membrane of the pharynx can lead to hoarseness. General examination can see the vocal folds chronic congestion and hypertrophy. 2. Vocal cord nodules or polyps are mostly caused by occupational factors such as improper use of voice for a long period of time, excessive, in addition to sinusitis, chronic cough secretion stimulation can also be caused. Endocrine disorders can also be caused. Examination of the vocal cords can see symmetrical small protrusions or small swellings. 3. Pharyngeal tumor can also cause hoarseness. If you have hoarseness for a long time, you need to go to the hospital for laryngoscopy. Then according to the results of the examination to choose a targeted treatment program.