A whole day of diarrhea (diarrhea) may be caused by acute gastroenteritis, oral rehydration salts, the use of montelukast, levofloxacin and other drugs for treatment. 1. Oral rehydration salts: several times diarrhea, easy to dehydration, electrolyte disorders, can be given oral rehydration salts to replenish water volume and electrolytes, as far as possible to prevent dehydration, electrolyte disorders. 2. Use of montelukast: the increase of diarrhea, easy to damage the intestinal mucosa, the use of montelukast, on the one hand, can stop diarrhea, on the other hand, can protect the intestinal mucosa. 3. Use of antibiotics: diarrhea with fever, consider the possibility of acute gastroenteritis, can be given antibiotics anti-infection treatment, such as levofloxacin (follow the doctor’s instructions). If you have diarrhea for a whole day, it is recommended that you go to the hospital, complete the stool routine, stool culture, blood tests, etc., to determine the cause of the disease and actively cooperate with the doctor’s treatment.