Hypothyroidism the common causes

Hypothyroidism caused the many reasons, common causes are: (1) The most common holders of hypothyroidism, many of which are chronic lymphocytic thyroiditis (Hashimoto's thyroiditis) evolved from. (2) About 10% of the patients from hypothyroidism caused by subacute thyroiditis. (3) patients due to a small number of congenital defects or thyroid hormone synthesis by the thyroid hypoplasia in neonatal morbidity or adolescent can be. (4) of the patients from iatrogenic causes. Treatment of hyperthyroidism, such as excessive thyroid tissue resection or excessive application of 131 I, serving excessive thyroid drug agents, and occasionally served on the ammonia Liu acid induced by the disease of anti-tuberculosis treatment. (5) In the area of endemic goiter due to iodine deficiency caused severe hypothyroidism. (6) of the anterior pituitary dysfunction secondary to hypothalamic lesions and. The onset age, the degree of dysfunction different from the symptoms also vary. There are three main types: (1) dysfunction began in fetal or neonatal shortly after birth, known as disease stay small. Mental and physical retardation. (2) dysfunction in the origin of childhood development, known as juvenile hypothyroidism, serious when called myxedema. There are different degrees of dwarfism, mental retardation. (3) dysfunction began adulthood, known as hypothyroidism, a serious feature of the non-pitting edema, called myxedema. Chills, fatigue, sleep thinking, less dynamic, intellectual decline, and his expression indifferent, heart rate slows, myxedema face. Hypothyroidism patients laboratory examination showed moderate or severe anaemia, often in the basic metabolism rate below 20 percent, serum protein binding is less than 3 mg iodine per cent, often serum cholesterol was significantly increased I was significantly lower than 131, often a flat curve, plasma T3 and T4 are lower. For patients with hypothyroidism, and the need for alternative use of thyroxine treatment. When the treatment results to improve symptoms, pulse rate and the basal metabolic rate back to normal, maintaining application of 40-120 mg / day, while gradually reducing the use of Chinese medicine thyroxine tablets until the body can charge their secretion of thyroid hormone. Long-term use of thyroxine tablets will inevitably cause toxic reactions, the basis of light, temperature and metabolic rate are higher than normal, palpitation, sweating, weight loss, increased excitability of nerve, insomnia, weight, vomiting, diarrhea, fever, pulse speed up without rules , muscle spasm or fibrillation, and even angina, heart failure, in case it should stop. Effect of thyroid hormone on the growth and development have greatly affected, it is normal bone growth and maturity necessary factors. In the process of human growth and thyroid hormones and pituitary growth hormone from synergies. If the lack of thyroxine growth retardation. Therefore, the treatment of hypothyroidism, the use of thyroxine must be reasonable, and when the body has been able to have sufficient secretion, hormone therapy can be discontinued.