My mom was diagnosed with bilateral nodules in the lungs by a chest x-ray and ct scan. the doctor told her that her system is good and there is no sign or symptom of any disease. but i'm worried. what should i do?

Soooo...: Nodule is not a diagnosis. It is a description of a finding on a study. Really need to know what kind of nodule. There are several types of nodules that are completely benign. He would not have told you all was well unless i really was. Doctors are generally very conservative. If her doc said not to worry why do you continue to worry? Maybe you should talk to them again.

Talk to the Dr.: May be you can let the doctor know of your concerns. Lung nodules are nonspecific, particularly if they are small. There can be certain characteristics on ct that may indicate that the nodules are benign, eg, from old infections.

CT is better: If the ct either found nothing in the lungs (meaning the chest xray findings were overlapping structures or outside the lungs) or what was found was clearly benign on the ct scan, then there is nothing to worry about. This assumes a high quality ct scan read by a competent radiologist.