Hi Cait24

Sorry to read you have developed SFN and the other conditions on top of your previous RSD (aka CRPS - Complex Regional Pain Syndrome).

I recently came across this interesting article about other complications of CRPS which may be of interest to you.

http://www.rsdinfo.com/Various_Compl...n_Syndrome.pdf

Given the time lapse between your original RSD it's also likely that the SFN is secondary to the Hypothyroidism - another link to an article discussing this:

Hypothyroidism: Can it cause peripheral neuropathy? - Mayo Clinic

As there are many different causes of SFN, including medications you may be taking for any of your conditions (as well as some antibiotics), it may be difficult to determine the exact cause. Treatment is dependent on the cause so all the best for figuring out what's going on and getting some useful treat ment.