Acute thyroiditis
Acute thyroiditis is an acute suppurative infection of the thyroid gland. It is caused by bacterial or fungal infection. Bacteria or fungi spread through the blood circulation, lymphatics or adjacent suppurative lesions to invade the thyroid gland and cause acute suppurative inflammation. Among them, the spread of adjacent suppurative lesions is the most common, and secondary infection is another possible cause. Acute thyroiditis has a rapid onset, with high fever, sweating and general discomfort. Local lumps appear in the thyroid gland, which are very tender, and the local skin becomes red and hot.