Vocal fold nodule - a mass of tissue that grows on the vocal folds.  The nodule makes it difficult to speak.  The voice, in many cases, will be hoarse and have frequent breaks.  The range of the voice will be greatly reduced and pain may be present.  

 

 

Vocal fold polyp - a clear, fluid filled bubble on the vocal fold.  The polyp can impair speaking and singing ability.  The voice sounds hoarse, breathy, wet, and has a low pitch.  Although other causes exist, vocal abuse is one of the causes.

 

 

Laryngitis - inflammation of the larynx.  It causes temporary, but complete loss of voice.  Laryngitis can last for a week or can last for many weeks.