Simple thyroid nodules usually do not cause hair loss. Hair loss may be associated with stress, seborrheic alopecia and patchy baldness, as well as endocrine diseases such as hypothyroidism. If hair loss is excessive, it is recommended to consult a doctor. Thyroid nodules are clumps of thyroid tissue that appear after abnormal proliferation of thyroid cells and are a common clinical condition. Simple thyroid nodules are usually asymptomatic, and larger nodules can have symptoms of compression of the trachea, esophagus, and laryngeal reentry nerves, such as dyspnea, dysphagia, hoarseness, etc., and generally do not have hair loss. When thyroid nodules are combined with hypothyroidism, there may be symptoms of hair loss. Hypothyroidism may also have symptoms such as fear of cold, constipation and edema. Thyroid nodule patients or people with severe hair loss should go to the hospital and be treated under the guidance of a doctor.