Severe and prolonged hypothyroidism and hyperthyroidism can cause loss of hair. The loss is diffuse and involves the entire scalp rather than discrete areas. The hair appears uniformly sparse. Regrowth is usual with successful treatment of the thyroid disorder, though it will take several months and may be incomplete.
Both hypothyroid and hyperthyroid and cause hair loss. The low levels of thyroid hormones in hypothyroid disorder reduce the activity and the ability of the body .
Hair loss related to thyroid conditions — both undiagnosed and diagnosed — affects millions of Americans. Here are ten things to do to deal with thyroid–