Diarrhea is one of the more common concerns in emergency medicine worldwide and in the United States, yet we often do not spend enough time understanding the breadth of causes and considerations for this syndrome. Do you know which patients benefit from Zinc? Would you like to review HUS? Can you mixup Oral Rehydration Solution if you needed to? We cover all of this and more in this “code brown” of a chapter! So come, get dirty with Alex and Venk in this truly crappy chapter of Always on EM!