Post-thyroid surgery weakness and drowsiness, its possible to have thyroid crisis, hypothyroidism and other causes. Symptomatic drug treatment is needed. 1. Thyroid crisis: it is caused by inadequate preoperative preparation, and its manifestations include vomiting and diarrhea, high fever and sweating, general weakness and drowsiness, coma, etc., which need medication. Firstly, propylthiouracil is needed to block the synthesis and conversion of T3 and T4, and then iodine is needed to inhibit the synthesis of T3 and T4. Then propranolol is used to decrease the response of T3 and T4 to the heart, and glucocorticoids are used to increase the stress capacity. In the symptomatic sedation, oxygen, cooling, and so on. 2. Hypothyroidism: it is mainly caused by surgery to remove too much thyroid tissue, resulting in too much damage to the gland, leading to insufficient secretion of thyroxine. Symptoms include indifference, weakness, drowsiness and obesity. Drugs are needed for treatment, often using levothyroxine tablets, eugenol and so on. The medication should be used under the direction of a physician. Thyroid crisis can be life-threatening and should be treated promptly.