Causes of Hypothyroidism
If your thyroid does not produce enough hormones, the balance of chemical reactions in your body can be changed. Various causes may be involved, including autoimmune diseases, treatments for hyperthyroidism, radiotherapy, thyroid surgery, and certain medications. Your thyroid gland is a small, butterfly-shaped gland located just under Adam's apple on the front of the throat. The hormones by the thyroid, triiodothyronine (T3) and thyroxine (T4), have a major impact on your health and affect every aspect of your metabolism. These hormones also affect the control of vital signs such as body temperature and heart rate.
When thyroid glands do not produce enough hormones hypothyroidism is occurs.
Hypothyroidism can be due to several factors including:
Hashimoto's thyroiditis is the most common hypothyroidism of autoimmune diseases. Autoimmune diseases occur when your immune system produces antibodies that attack your own tissues. It occurs due to the attack of the antibodies of the immune system. Sometimes this process affects the thyroid gland. Scientists do not know why this happens, but it is likely to be a combination of factors, such as genes and an environmental trigger. However, this happens, these antibodies affect the thyroid's ability to produce hormones.
Overreaction to the treatment of hyperthyroidism.
Due to the hyperthyroidism people gets treatment to reduce the amount. The purpose of these treatments is to restore thyroid function to normal. But sometimes the correction of hyperthyroidism can lead to an excessive reduction in the production of thyroid hormones, leading to permanent hypothyroidism.
Complete disappearance or a large part of the thyroid can slow down or stop hormone production. In this case, you need to take thyroid hormones for life. Irradiation of head and neck cancer can affect the thyroid gland and cause hypothyroidism.
A number of medications can contribute to hypothyroidism. If you are taking medication, ask your doctor about the effects on the thyroid gland.
Less commonly, hypothyroidism can be due to one of the following causes:
Defective thyroid is one of the reasons for hypothyroidism in babies. In most cases, the thyroid gland has not developed normally for unknown reasons, but some children have a hereditary form of the disease. Babies with congenital hypothyroidism often appear normal at birth. This is one of the reasons why most states today require neonatal thyroid screening.
Pituitary gland Disorder
A relatively rare cause of hypothyroidism is the inability of the pituitary gland to produce sufficient thyroid-stimulating hormone (TSH), mostly due to a benign pituitary tumor.
Some women develop hypothyroidism (postpartum hypothyroidism) during or after pregnancy, often because they produce antibodies to their own thyroid gland. If left untreated, hypothyroidism increases the risk of miscarriage, premature birth, and pre-eclampsia, a condition that significantly increases a woman's blood pressure during the last three months of pregnancy. It can also seriously affect the development of the fetus.
Iodinated micronutrients, found mainly in seafood, algae, plants that grow in iodine-rich soils and iodized salt, are essential for the production of thyroid hormones. Very little iodine can lead to hypothyroidism, and too much iodine can increase hypothyroidism in people already affected. Iodine deficiency is common in some parts of the world, but the addition of iodine to table salt has virtually eliminated this problem in the United States.