Smoking is not recommended for patients with hypothyroidism. Smoking in patients with hypothyroidism will affect blood lipids to a certain extent, which may lead to increased cholesterol and triglycerides; long-term smoking will also accelerate the occurrence of atherosclerosis, which is not conducive to cardio-cerebral and cerebral vascular health; cigarettes contain nicotine, which will make blood vessels constricted, leading to fluctuations in blood pressure, which may also lead to cardio-cerebral and cerebral vascular diseases; some of the components in cigarettes may aggravate the condition of hypothyroidism. In daily life, patients with hypothyroidism should avoid smoking, maintain a regular routine, and exercise appropriately. Patients diagnosed with hypothyroidism should actively cooperate with their doctors to maintain a healthy lifestyle and diet.