The effects of total thyroidectomy have both immediate and long-term effects, as follows: 1. Immediate effects: i.e. short-term effects, whether there is damage to the laryngeal nerve after surgery, whether there is damage to the larynx, hematoma formation, whether there is septicemia, hoarseness, which are usually basically visible within 2 weeks, and some are completely visible in 3-7 days, such as choking on water, symptoms may be related to complications of surgery; 2. Long-term effects: The body lacks thyroxine after total thyroidectomy and needs to be supplemented with exogenous thyroxine, if not, the patient is more depressed and can’t fight, and needs to take eugenol for a long time and for life. So the long term effects are related to the lack of thyroxine and the need for timely and lifelong supplementation of eugenol. At the same time, in the process of supplementing eugenol, one needs to analyze the amount and frequency of supplementation in order to regulate one’s body to a certain state.