Non-concave mucinous edema is the characteristic clinical response to thyroid hormone deficiency in adults. Primary hypothyroidism (hypothyroidism) is the most common type and is probably an autoimmune disease. It usually occurs as a result of Hashimoto’s thyroiditis and is often accompanied by a firm enlarged thyroid gland, which later develops as the disease progresses to a shrunken, fibrous thyroid with no or little function. The second most common type is post-treatment hypothyroidism, especially due to hyperthyroidism with radioactive iodine and surgical treatment, propylthiouracil, tabazol and iodine overtreatment of hypothyroidism, which often recovers after termination of treatment, and mild hypothyroidism commonly seen in older women. So what are the causes of non-concave mucinous edema? Here’s what we can tell you. 1, caused by thyroiditis: chronic lymphocytic thyroiditis as the main cause, the production of thyroid antibodies, causing destruction of thyroid follicles, and finally caused by mechanized atrophy, called idiopathic hypothyroidism. 2, nodal disease: about 10% of the thyroid gland is involved, which can also lead to insufficient synthesis and secretion of thyroxine, causing hypothyroidism, spontaneous hypothyroidism in hyperthyroidism, may be combined with autoimmune thyroiditis. 3. Emotional stimulation: mental stimulation leads to liver qi stagnation and liver depression leads to spleen deficiency, which leads to abnormal transportation and internal dampness and phlegm. 4, improper diet: due to improper diet, damage to the spleen and stomach, deficiency of middle qi, abnormal transportation and transformation, diet water and grain can not be transported and transformed, phlegm and drinks are generated internally; phlegm and dampness are congested, obstructing the qi mechanism and damaging the spleen and Yang. The spleen is the foundation of the posterior. If the spleen yang is weak, the kidney fire will nourish the spleen and the kidney, resulting in a deficiency of both the spleen and the kidney, and then symptoms such as loss of appetite, coldness, drowsiness and laziness, and general swelling will be seen. 5, hypothalamic lesions: some cause of hypothalamic hypofunction and cause a decrease in thyrotropin-releasing hormone, and finally lead to a decrease in thyrotropin, thyroxine. 6, external evil invasion: most of the wind-heat poisonous evil, from the mouth and nose invasion, the poisonous evil gathered in the front of the neck, then see the pharynx and the front of the neck swelling, pain; if over use of cold things, internal injury to Yang Qi, although the neck heat toxicity removed, the pain disappeared, but can be seen in the pronunciation of low, fear of cold, and even swelling and other symptoms.