It is possible that laser therapy will increase thyroid function. After exposure to LLLT, the thyroid gland produces more thyroid hormone. Following treatment sessions, the thyroid gland produces more T3, T4, and T5 thyroid hormones. After laser therapy, less thyroid medication was needed by patients who used LLLT. There is a very good chance that this is related to a healthier thyroid gland. By producing more thyroid hormone, the thyroid gland will not need to rely as much on other sources of thyroid hormone, such as thyroid medications. There was a decrease in thyroid antibody levels in some patients who used laser therapy. Inflammation and damage to the thyroid gland are caused by antibodies such as thyroglobulin antibody and thyroid peroxidase antibody. Additionally, some patients experienced increased blood flow to their thyroid glands. Increasing blood flow to the thyroid gland supports thyroid hormone production and may reduce inflammation by delivering more nutrients. The thyroid gland volume increased in some patients after laser therapy use as measured by ultrasound. In this case, the enlargement observed is normal and not indicative of a goiter. Atrophy or shrinkage of the thyroid gland is possible as a result of Hashimoto's disease over time. It may be an indication of reduced inflammation and increased thyroid tissue recovery if the thyroid gland volume increases.