If the diarrhea is caused by heatstroke, it is better to take kefir, while if the diarrhea is caused by other pathogenic infections, such as bacterial infections, it is not effective to take kefir. In addition, we also need to pay attention to special people, such as infants, pregnant women, maternity, menstruation, lactating women are forbidden to take keflexa, other people (adults) can eat appropriate keflexa. Of course, we must emphasize that the diarrhea caused by heatstroke can only eat. If you take keflexa for three days, the effect is not satisfactory, you need to go to the hospital in time to cooperate with the doctor to check the stool routine, rotavirus, C-reactive protein, blood tests, etc., to help understand whether it is a bacterial infection or viral infection, or other special causes of diarrhea, if necessary, to cooperate with the doctor to give drug treatment.