What are the symptoms of elevated thyroid-stimulating hormone (TSH) levels?

The symptoms of elevated thyroid-stimulating hormone (TSH) are diverse, mainly including: 1. Physical symptoms: Patients may experience fatigue, tiredness, excessive sleepiness, and mental lethargy, which result from a slowed metabolism caused by elevated TSH levels. Additionally, weight loss, dry skin, and hair loss or brittleness may occur. Some patients may also develop swelling of the hands and feet, as well as facial and eyelid edema, known as myxedema. 2. Cardiovascular symptoms: Elevated TSH may stimulate the heart, causing palpitations, shortness of breath, chest tightness, and other symptoms. In severe cases, cardiovascular complications such as pericardial effusion and heart failure might occur. 3. Neurological symptoms: Patients may experience difficulty concentrating, memory decline, and slowed reaction time. Without treatment, these symptoms may progress to depression over time. 4. Digestive system symptoms: These include reduced appetite, constipation, and abdominal distension. In severe cases, paralytic intestinal obstruction may develop.