Arsenic poisoning (or arsenicosis) is a medical condition that occurs due to elevated levels of arsenic in the body.[4] If arsenic poisoning occurs over a brief period of time, symptoms may include vomiting, abdominal pain, encephalopathy, and watery diarrhea that contains blood.[1] Long-term exposure can result in thickening of the skin, darker skin, abdominal pain, diarrhea, heart disease, numbness, and cancer.[1]