How to distinguish between true and false black stool

True or false black stool can be distinguished by color, shape, frequency, etc., as follows:

1.

True black stool is usually dark black or pitch black, while false black stool may be dark red, tan or green.

2. Shape

True black stool is usually striped or lumpy in shape, with clear edges and hard texture. False black stool may be irregular in shape, fuzzy in edges and soft in texture.

3. Frequency

True black stool is usually low, and may occur once every few days, while false black stool may occur more frequently, and may occur every day.