Patients 20 days after thyroid surgery can eat crayfish, but in moderation. Crawfish contains protein, vitamin E, niacin, calcium, vitamin B2, iron, phosphorus and other nutrients, 20 days after thyroid surgery patients appropriate eating crayfish can play the purpose of replenishing nutrients. It should be noted that the lobster allergy or gout patients are not recommended to eat. Although crayfish contains some nutritional value, but it is not recommended to consume too much at one time, will increase the burden on the gastrointestinal tract, causing indigestion. Patients 20 days after thyroid surgery should actively cooperate with the doctor’s treatment, regular postoperative review, and maintain a healthy diet can be.