I've noticed a small bump on the left side of my thyroid gland and finally decided to do a search on what it could be.

I came across an excellent site and I wanted to recommend it.

"The thyroid produces hormones that affect your body's metabolism and energy level. Thyroid problems are among the most common medical conditions but, because their symptoms often appear gradually, they are commonly misdiagnosed.

The three most common thyroid problems are the underactive thyroid, the overactive thyroid , and thyroid nodules." http://www.endocrinologist.com/thyroid.htm

This next link is the main one that I wanted to recommend.