Vocal cord nodules are not contagious. They are noncancerous growths that develop on the vocal cords due to vocal strain or misuse. They are commonly caused by excessive shouting, singing, or speaking loudly for extended periods. Vocal cord nodules are not caused by a virus or bacteria and cannot be transmitted from person to person. However, it is important to seek medical attention if you experience symptoms such as hoarseness, vocal fatigue, or difficulty speaking, as these may indicate the presence of nodules.