Hypothyroidism is hypothyroidism, and patients with hypothyroidism are not allowed to smoke. Hypothyroidism patients are prone to hyperlipidemia, if hypothyroidism patients smoking at this time may lead to blood vessel damage, more likely than normal people to cause atherosclerosis. Patients with hypothyroidism have reduced synthesis and secretion of thyroid hormones, and the body is in a low metabolic state, which can be manifested as chills, fatigue, a feeling of swelling in the hands and feet, lethargy, memory loss, less sweating, joint pain, weight gain, constipation and other symptoms. Tobacco contains a large amount of nicotine, carbon monoxide and tar, and smoking in patients with hypothyroidism will cause damage to the endothelial cells of blood vessels, coupled with the fact that patients with hypothyroidism may have elevated blood lipids, leading to an increased risk of atherosclerosis formation. It is recommended that patients with hypothyroidism under the guidance of a doctor to carry out standardized treatment, so as to avoid delaying the condition and triggering adverse consequences.