Diarrhea can cause low blood potassium. Diarrhea is known medically as diarrhea. In addition to pooping out feces, electrolytes are lost during diarrhea. If severe diarrhea, or long-term diarrhea, can not effectively replenish electrolytes in a timely manner, there will be varying degrees of electrolyte disorders, including low sodium, low potassium, low calcium, low magnesium and so on. Therefore, when diarrhea is present, electrolyte fluids should be supplemented appropriately. In addition to causing electrolyte disorders, diarrhea will also lose a large amount of water, resulting in dehydration of the body, the appearance of sunken eye sockets, urine and tears, dry skin mucous membranes, etc., due to the lack of circulating blood volume palpitations (heartbeat accelerated, often accompanied by panic), pale, cold sweating, irritability and other manifestations. Severe diarrhea leads to dehydration, electrolyte disorders and acidosis, which may be life-threatening if not rescued in time. Diarrhea should go to the regular hospital to correct the water, electrolyte, acid-base balance disorder, and identify the cause of diarrhea, timely treatment. Self-treatment should be avoided to delay the condition.