Originally Posted by
LunarCoffee
Calm down, black specks are not blood. Upper intestinal blood in stool is always in larger chunks and is tarry, sticky, and shiny in texture, because at that point in the colon, the stool is still liquid, which allows the blood to mix with the stool and dry. Also, the amount of blood required to stain a stool black is actually ridiculously high, so you'd be noticeable weaker, as in climbing up the stairs becomes very tiring. As for the dark stool, are you sure you're getting enough fiber, or food in general? Anxiety makes you lose your appetite in many people, so you might not be getting enough. That would also explain the runnier stool, as there is less soluble fiber to bind the stool together, and less insoluble fiber to add bulk.