There are many types of thyroiditis, and the most common one associated with hypothyroidism is Hashimoto's thyroiditis. Symptoms of hypothyroidism include multi-system involvement. In the nervous system, it manifests as reduced memory and attention, and drowsiness; in the cardiovascular system, it presents as bradycardia, faint heart sounds, and cardiac enlargement; in the musculoskeletal system, it manifests as slowed movement and joint disorders; in the digestive system, it presents as loss of appetite, bloating, and constipation; in the respiratory system, it manifests as weak and shallow breathing; in the hematologic system, it can manifest as anemia; in the endocrine system, it can present as reduced gonadal function accompanied by hyperprolactinemia, menorrhagia, amenorrhea or infertility, hair loss, and the skin and mucous membranes appear pale with myxedema.