When you say you always have a normal thyroid test, which tests have you had? And
what were the actual lab results?
I was interested in finding out if there is a link between lyme and hypothyroidism. When I
googled "lyme disease and thyroid problem" a lot of patient stories came up linking the two.
It was difficult to find actual studies but I did find the following in the National Institute of
Health's National Institute of Allergy and Infectious Diseases:
The Role of Autoimmune Reactivity
The results of recent studies conducted by NIAID and intramural scientists from the National Institute of Neurological Disorders and Stroke indicate that T cells from patients with chronic Lyme disease are reactive not only against Borrelia burgdorferi-specific antigens but also against various host (self) antigens (Nature Med, 5:1375, 1999). Such antigenic mimicry might generate autoimmune inflammatory reactions that could be responsible for arthritic as well as some neurological symptoms associated with chronic Lyme disease. Intramural and extramural scientists are exploring the implications of this finding.
Antibodies against the OspA epitopes of B. burgdorferi also have been shown to cross react with neural tissue (J Peripheral Nervous System. 9:165, 2004; J Neuroimmunol. 159:192, 2005) as well as myocin (J Clin Microbiol. 43:850, 2005). Such antigenic mimicry may have the potential to generate autoimmune inflammatory reactions that could be responsible for the neurological symptoms associated with chronic Lyme disease. Intramural and extramural scientists are evaluating this possibility in greater detail. In this context, it is interesting to note that homologies between proteins of B. burgdorferi and thyroid antigens also have been reported (Thyroid. 14:964, 2004).
So it looks like they are studying the association between lyme and autoimmune diseases.
Have you been tested for thyroid antibodies? Also wondering if they checked your free
T3 and free T4 besides TSH. A lot of doctors only test TSH and you can still have
thyroid problems with a normal TSH.