The difference between ordinary diarrhea and AIDS diarrhea lies in the different causes, different manifestations and different treatments. 1. Different causes: ordinary diarrhea is caused by cold or eating food contaminated by pathogens. Diarrhea caused by AIDS is caused by HIV infection, which damages the immune system and leads to the proliferation of pathogenic bacteria in the intestinal tract, resulting in diarrhea. 2. Different performance: ordinary diarrhea may be accompanied by fever, vomiting, abdominal pain, pus and blood stools, headache and other symptoms, usually through treatment can be relieved or cured. AIDS diarrhea, in addition to the above symptoms, may also be accompanied by fatigue, prolonged low-grade fever, enlarged lymph nodes, skin rashes and other symptoms, which can be relieved more slowly by medication. 3. Different treatment: ordinary diarrhea can be cured quickly after anti-infective treatment with amoxicillin, ribavirin and other drugs. But for diarrhea caused by AIDS, after the general anti-diarrhea, anti-infection treatment, will not improve the patient’s own situation. It is necessary to apply drugs for antiviral treatment, such as tenofovir disoproxil fumarate, lamivudine doitiravir and so on. If the patient has recurrent diarrhea that is difficult to treat, he/she should go to the hospital in time and take a blood test for HIV antibody to determine whether he/she is infected with HIV, and then take appropriate treatment under the guidance of the doctor to control his/her condition in a timely manner.