The severity of hyperthyroidism symptoms is related to factors such as the length of medical history, the degree of hormone elevation and the age of the patient. The main ones are: excessive eating, weight loss, fear of heat, excessive sweating, palpitations, agitation, irritability, insomnia, fatigue, increased stool frequency or diarrhea, protruding eyes, enlarged thyroid gland, and scanty menstruation in women. There are also some special types of hyperthyroidism including thyroid crisis, thyrotoxic heart disease, hyperthyroidism in pregnancy, and indifferent hyperthyroidism with some special symptoms. Thyroid crisis: Also known as hyperthyroid crisis, it is a syndrome of acute exacerbation of thyrotoxicosis, which mostly occurs in patients with untreated or inadequately treated more severe hyperthyroidism. Clinical manifestations include high or excessive fever, profuse sweating, tachycardia, irritability, anxiety, delirium, nausea, vomiting, diarrhea, and in severe cases, heart failure, shock and coma. Thyrotoxic heart disease: The effect of thyrotoxicosis on the heart leads to tachycardia, arrhythmia, atrial fibrillation and heart failure. Hyperthyroidism in pregnancy: The negative effects of hyperthyroidism on pregnancy are mainly miscarriage, preterm delivery, pre-eclampsia, and placental abruption. Apathetic hyperthyroidism: It is mostly seen in elderly patients with insidious onset and atypical hypermetabolic symptoms, mainly manifesting as weakness, palpitations, anorexia, depression, drowsiness, and significant weight loss. Therefore, the symptoms of hyperthyroidism mainly include the above aspects, but some patients may have atypical symptoms. Therefore, we cannot rely on symptoms to confirm the diagnosis of hyperthyroidism, but patients with the above symptoms need to pay attention to them and get early diagnosis and treatment.