Separate white tissue/mucus looking sticky clumps with every bowel movement. what causes this?

Possible colitis: Go see your dr and be referred to a gastroenterologist for a stool test and possible coloscopy. Usually it's not serious. Colitis- general term for inflammation of the large intestinal wall, could be from inflammation, infection, auto-immune condition, etc. Colonoscopy will confirm the diagnosis. Eat more fiber, fruits and veggies and drink more water. Take care!