Editing Thyroid (section)

====Inflammation====
{{Main|Thyroiditis}}
Inflammation of the thyroid is called [[thyroiditis]], and may cause symptoms of hyperthyroidism or hypothyroidism. Two types of thyroiditis initially present with hyperthyroidism and are sometimes followed by a period of hypothyroidism – Hashimoto's thyroiditis and [[postpartum thyroiditis]]. There are other disorders that cause inflammation of the thyroid, and these include [[subacute thyroiditis]], [[acute thyroiditis]], [[silent thyroiditis]], [[Riedel's thyroiditis]] and traumatic injury, including [[palpation thyroiditis]].{{sfn|Harrison's|2011|pp=2237}}

[[Hashimoto's thyroiditis]] is an [[autoimmune disorder]] in which the thyroid gland is infiltrated by the [[lymphocyte]]s [[B cell]] and [[T cell]]s. These progressively destroy the thyroid gland.{{sfn|Harrison's|2011|pp=2230}} In this way, Hasimoto's thyroiditis may have occurred insidiously, and only be noticed when thyroid hormone production decreases, causing symptoms of hypothyroidism.{{sfn|Harrison's|2011|pp=2230}} Hashimoto's is more common in females than males, much more common after the age of 60, and has known genetic risk factors.{{sfn|Harrison's|2011|pp=2230}} Also more common in individuals with Hashimoto's thyroiditis are [[Type 1 diabetes]], [[pernicious anaemia]], [[Addison's disease]] [[vitiligo]].{{sfn|Harrison's|2011|pp=2230}}

[[Postpartum thyroiditis]] occurs sometimes following [[childbirth]]. After delivery, the thyroid becomes inflamed and the condition initially presents with a period of hyperthyroidism followed by hypothyroidism and, usually, a return to normal function.{{sfn|Harrison's|2011|pp=2238}} The course of the illness takes place over several months, and is characterised by a painless goitre. Antibodies against thyroid peroxidase can be found on testing. The inflammation usually resolves without treatment, although thyroid hormone replacement may be needed during the period of hypothyroidism.{{sfn|Harrison's|2011|pp=2238}}