Abnormal thyroid function is a common thyroid disease. Once the body has abnormal thyroid function, it will have the following symptoms: 1. Hypothyroidism has reduced sympathetic excitability, which can make people depressed; hyperthyroidism can cause sympathetic excitation in the body, making people irritable and excited. 2. Increased number of stools or constipation: Hypothyroidism patients secrete too little thyroid hormone, which leads to slow intestinal peristalsis and constipation; hyperthyroidism patients, on the contrary, have an increased number of stools. 3. Insomnia or drowsiness: Patients with hypothyroidism show signs of lethargy and drowsiness due to slowed metabolism in the body. Hyperthyroidism, on the other hand, can easily lead to insomnia due to hyper-metabolism and increased excitability. 4. The body loses weight or becomes fat: Hypothyroidism patients have slower metabolism, less consumption of substances in the body, insufficient power and slow excretion, so it causes edema and weight gain in the body. However, patients with hyperthyroidism, because of their high metabolic level and high energy consumption, will instead appear to be thin. The common clinical manifestations of abnormal thyroid function are as above, and there may also be symptoms such as loss of libido, average or large increase in appetite, panic discomfort, slow reaction, thickened neck, and protruding eyes.