Acute infectious thyroiditis is a painful thyroiditis caused by a bacterial or fungal infection. A pus-filled thyroid abscess is common.
Symptoms include neck pain, pain with swallowing, tenderness, fever, chills, flu-like symptoms. You may have a tender neck mass you can feel externally. Thyroid function is usually not affected.
Treatment involves drainage of the abscess and antibiotics or antifungal drugs to treat the infection. In rare cases, surgery may be necessary to remove the abscess