Does HIV cause loose stools (not diarrhea) and on and off constipation as it's only symptom and occasional skin boils or lumps? I did an HIV test in a government hospital. They said you are HIV negative. I don't know why I am not able to believe them. They said they did an Elisa test. I am fearing to go for another test. They place I test is NACO accredited. My symptoms are not letting me overcome this fear. Symptoms are: 1. On and off constipation 2. Loose stools most of the time from last 6 months. 3 a painful lump in my left underarm for 7 days which doctors said its not lymph node swelling.