Hyperthyroidism is short for hyperthyroidism, and hyperthyroidism may cause patients to have scanty periods. Hyperthyroidism is caused by an overactive thyroid gland that increases its own synthesis and secretion of thyroid hormones. Normally, the body’s own thyroid gland produces and secretes thyroid hormone to meet the body’s needs. Hyperthyroidism occurs when the thyroid gland itself produces too much thyroid hormone. In addition to hyperthyroidism, which may lead to scanty menstruation, hyperthyroid patients often have symptoms such as agitation, irritability, tachycardia, fatigue, fear of heat, excessive sweating, weight loss, hyperphagia, increased frequency of bowel movements or diarrhea. Some patients with hyperthyroidism may present with pre-tibial mucous edema, localized skin thickening and thickening of the lower limbs in front of the tibia, and plaque-like elevation. Patients with hyperthyroidism who experience scanty menstruation are advised to go to the hospital for a doctor’s judgment and standardized treatment.