Everyday the colour of my potty is black?

If you have black stool, you need to see your doctor and make sure you are not bleeding. Black stool could mean blood in your stool and this would need to be investigated to find out why. There are other reasons for black stool-if you are taking iron, for example, your stool can be black. So, see your doctor and have your stool tested to find out the reason for the black stool. Good luck!