✔ 最佳答案
Hoarseness of voice can be due to many reasons. The vocal cord can be damaged somehow, affecting the voice.
Larynx cancer is a type of head and neck cancer that may affect the voice box. Usually glottic (vocal cord) cancer arise when tumor obstructs the area, causing the person's voice to change. There may not necessarily be pain in the throat, but the voice change is definitely one of the symptoms experienced by patients.
Better go have it checked out if it has been a month already. Glottic cancers have high cure rates when found in early stage.