Low T3 syndrome, generally the symptoms are not obvious, in severe cases there may be symptoms of cold fatigue, less sweating, memory loss, lower limb edema, eyelid edema, general fatigue, bradycardia and low voltage, etc. The symptoms of other diseases that mainly lead to this syndrome are obvious, like symptoms of coronary heart disease myocardial infarction, diabetes, liver cirrhosis, burns, hyperosmolar coma, kidney failure, severe trauma and other diseases. The treatment can be the etiological treatment of the original disease, but also the corresponding thyroid hormone replacement therapy, you can eat eugenol, diet should also be controlled, three meals less to eat regularly, choose coarse grains such as cornmeal, buckwheat, oats, etc., usually monitor blood sugar, blood pressure, thyroid function, thyroid ultrasound, and to identify with hypothyroidism, anemia, idiopathic edema.