The term “hypothyroidism” generally refers to hypothyroidism. Patients with hypothyroidism may experience symptoms such as bradycardia, fatigue, and weight gain. Hypothyroidism is an endocrine disease in which the body’s metabolism is reduced due to thyroid hormone resistance or thyroid hormone deficiency. Clinical manifestations include chills, fatigue, weight gain, bradycardia, decreased concentration, memory loss, constipation, oligosweat, drowsiness, and dry skin. Neonates with hypothyroidism may show significant lag in growth and development, large and outward-facing tongue, and poor response to the outside world. Patients with symptoms similar to hypothyroidism are advised to go to the hospital and ask the doctor to make a judgment, rather than making a blind judgment on their own.