Hedgehogs suffer due to a lack of insects. If their weight is not appropriate for the winter, they will not wake up in spring. This article lists the inital care, makeshift housing and food for hedgehogs until you can hand them over to a rescue as early as possible or, at least, follow their advice.
Frequently Hashimoto's patients are treated with T4 hormones only and are told to avoid iodine at all costs. The article describes that this causes problems such as hair loss or weight gain and suggests solutions.