Thyroid nodule pumping will not cause diarrhea, if it is caused by nervousness, improper diet and other physiological factors, usually do not need to take special treatment. Or consider intestinal infections, gastrointestinal dysfunction and other diseases, need to take medication for the cause of the disease. 1. Physiological factors: If the patient is nervous during the extraction of thyroid nodule fluid, or improper diet, transient diarrhea may occur after the extraction of fluid. If there is no other discomfort, it is a normal phenomenon and no special treatment is needed. Keep positive and optimistic mindset, reasonable diet can be. 2. Intestinal infections: diarrhea may be caused by bacterial or viral infections, patients can replenish fluids as appropriate under the guidance of the doctor, and if it is caused by bacterial infections, it can be treated with oral antibiotics. 3. Gastrointestinal dysfunction: diarrhea is also considered to be caused by gastrointestinal dysfunction. Patients can take oral antidiarrheal drugs, such as loperamide, or antispasmodic drugs, such as pivoxyl bromide, trimethoprim, etc. as prescribed by the doctor. There are many causes of diarrhea in patients, and it is recommended to go to regular hospitals to find out the cause of the disease.