The individual manifestations of patients with hypothyroidism are different and cannot be generalized. Hypothyroidism is a disease caused by insufficient synthesis and secretion of thyroid hormones. There are many different causes of hypothyroidism, so the clinical manifestations vary. Early symptoms of hypothyroidism are usually not obvious, but the following symptoms may occur in severe cases: 1) Cardiovascular system: chest tightness, pericardial effusion, enlarged heart, shortness of breath, bradycardia, coronary artery disease, etc. 2) Reproductive system: common in women. 2. The reproductive system is commonly seen in women with disrupted menstrual cycles, heavy menstruation, and in severe cases, infertility. In men, it can cause impotence, premature ejaculation, sexual dysfunction, etc. 3.Sometimes it also manifests as joint pain, chronic arthritis, osteophytes, etc. 4.Loss of memory, obesity, weight gain, dry skin, weakness, frequent constipation, and slow reaction. 5.Pale face, no expression, and sometimes very thick but brittle nails. 6, reluctance to eat, frequent bloating, some people may develop anemia or iron deficiency anemia because of the lack of stomach acid. Hypothyroidism threatens people’s health, and although there are not many obvious symptoms in the early stages that can be easily detected in time, it needs to be treated in time once it is detected.