One possibility is that you have had a chronic infection that colonized your thyroid gland and caused the thyroid-related problems. Without
treatment these can cause relapsing and remising conditions over time, but they usually cause other signs and symptoms as well, such as fatigue, brain fog and cognition problems, respiratory and gastrointestinal conditions, arthritis-like conditions, etc. (You can see a long list of these on our website, www.immed.org under signs and symptoms).
Prof.