Nodules can be caused from a combination of factors. I found that shallow, incorrect breathing causes a lack of support and results in acid reflux. This condition is exacerbated by increased stress from negative unconscious thinking. This in turn starts to effect the strength and health of your vocal chords. Once one masters correct breathing, abdominal support, proper placement of tone, and mental calmness, the voice is free and supported with ease, relieving the stress on your vocal cords. This will allow your nodules to heal. The videos on breathing and conscious thought will create an environment that allows you to heal.
Once your nodules have healed, you will now be able to sing (again).