Constipation and diarrhea alternately repeated for 2 months may be related to gastrointestinal dysfunction, enteritis, intestinal tumors and other factors, the need for a clear examination, targeted use of levofloxacin, mesalazine and other medications, serious cases also need surgery. 1. Gastrointestinal dysfunction: constipation and diarrhea alternately recurring for 2 months is mostly gastrointestinal dysfunction, you need to keep relaxed and happy, drink more water, pay attention to the diet light, nutritious, balanced, eat more easily digested food, eat less spicy stimulating cold and greasy food, exercise every day. 2. Enteritis: constipation and diarrhea alternately repeated for 2 months may suffer from enteritis, you can take levofloxacin and other drugs to fight infection, mesalazine anti-inflammatory, etc., pay attention to the diet light nutrition, more water and so on. 3. Intestinal tumor: constipation and diarrhea repeated alternately for 2 months may have intestinal tumors, intestinal tumors need to be resected in time if there is a chance of surgery, and can be treated by radiotherapy if surgery is not suitable. It is recommended to go to regular hospitals for detailed examination to determine the treatment plan, and the medication should be guided by the doctor.