You can usually eat crawfish 20 days after thyroid surgery, but it needs to be in moderation. Crayfish contains protein, vitamin E, niacin, calcium, iron, potassium and other nutrients, so patients with 20 days of thyroid surgery can eat crayfish, which helps replenish the nutrients. Although crayfish has a certain nutritional value, but should not be eaten in large quantities at once, so as not to cause indigestion. It is also recommended that greasy and spicy food should be avoided when eating crayfish, otherwise it is not conducive to wound healing and recovery. Post-thyroid surgery patients should follow a healthy diet, avoid overeating, there may be hypothyroidism after surgery, you should do a good thyroid function test. Patients 20 days after thyroid surgery should actively cooperate with the doctor’s treatment and have regular postoperative checkups.