Sometimes, when I poop, i have a bright yellow liquid that comes out with it. This only happend recently to me the day before and today, but i had drank tea a few hours before i went to bed, both times, although the day before was during the day. I have no pain and brown poop, but have been having alot of gas lately. I take vitamins. I should also be getting my period soon. Can tea or period cause yellow liquid when we poop?