Potassium deficiency may lead to dry stools. When there is a lack of potassium in the body, especially when hypokalemia occurs, it will often lead to slower bowel movement, the stool stays in the intestines for a longer period of time, and water will be reabsorbed, which will result in dry stools, and will even lead to constipation. In the case of severe potassium deficiency, paralytic intestinal obstruction may also develop and stools cannot be discharged. There are many causes of potassium deficiency. If hypokalemia has occurred, it may be caused by hyperthyroidism, renal tubular acidosis, primary aldosteronism and other diseases, which need to be promptly consulted in hospitals, and cause-specific treatment should be carried out after identifying the cause.