Hello, Thank you for your query. Yes, the diarrhea and swallowing of tobacco juice could be related. I recommend : -a physician and gastroenterologist consult -blood tests (complete blood count, kidney and liver function tests, electrolyte levels ) -urine analysis -stool analysis - an endoscopy and colonoscopy to check for inflammatory bowel lesions. Based on this we can arrive at a diagnosis and treatment plan. In the meantime : -avoid spicy, oily foods -include more natural fiber in the diet like fresh whole fruits and vegetables. -keep well hydrated (enough to have light coloured urine) Please see a doctor as soon as possible. Hope this helps. Please let me know if there is anything else I can help you with. Wish you good health