Hyperthyroidism is hyperthyroidism, the cause of swelling of the upper eyelid may be hyperthyroidism itself, excessive secretion of thyroid hormone, autoimmune factors, etc., but also may be drug-induced hypothyroidism, renal insufficiency and other causes. 1. Excessive secretion of thyroid hormone: excessive secretion of thyroid hormone in patients with hyperthyroidism may lead to an increase in the local tissue gap and symptoms of swelling of the upper eyelids. 2. Autoimmune disease: Hyperthyroidism itself is an autoimmune disease, and the presence of antibodies to thyrotropin receptors in the body may lead to the accumulation of some immune complexes in the eyes, resulting in eyelid swelling. 3. Pharmacological hypothyroidism: When taking drugs such as methimazole tablets and propylthiouracil tablets to treat hyperthyroidism, the dosage is too large and hypothyroidism may occur. Hypothyroidism, on the other hand, leads to a decrease in the body’s metabolic rate, which leads to the deposition of mucus under the skin and the appearance of swollen upper eyelids. Hyperthyroidism can also be seen in other causes, such as renal insufficiency, etc. It is recommended to go to a specialized hospital to clarify the cause of the disease and under the guidance of the doctor to carry out further examination and treatment.