Hello Dear, Thank you for posting to us. There are a good number of possibilities in your affection which could be the cause of your problem. There are numerous microorganisms that can cause diarrhea and also toxins. Structural damages to the lining of the intestines can also lead to you having diarrhea. For the microorganisms to be isolated, a stool exams and culture needs to be done to isolate the common germs like E. coli, E. hystolitica, Shigella, Salmonellose, fungi etc. Viral infections are the most common causes of diarrhea in children. Stool culture and sensitivity can determine the diseases causing germ and the antibiotics needed to cure the diarrhea. Further investigation such as a colonoscopy and a rectal exams will need to be performed by your doctor. I will also advice an HIV serology. As of now, what you should consider is taking oral rehydration solutions to keep fluid and electrolytes balance in your system and prevent dehydration. You can get the ORS salt over the counter and do a mixture and drink atleast 2-3 liters per day. Other gastrointestinal affections like irritable bowel diseases, ulcerative colitis, crohn s diseases etc can also lead to the persistent diarrheal episodes. You will need to pay a visit to your doctor or gastroenterologist. Thank you and hope this helps