Hi and welcome to the forum! It is my pleasure to help you.
You like to know what is the cause of a slimy green discharge from the anus.
A discharge from the anus different in color and consistence from the usual may be caused by infections. If it is followed by pain all through the abdomen, diarrhea and increased body temperature, it is intestinal infection caused by bacteria. If it is followed by pain located near the anus, there may be underlaying infection caused by anal fistula(a passage between the skin and the anus) or inner anal fistula. However, green discharge may appear after consuming iron supplements or leaves-like vegetable such as spinach, lettuce and etc.
Given the data that you provided, a slimy green discharge from anus, you may or may not experience any medical condition. You may consider seeing you doctor for further information about diagnosis and treatment options. You may also consider seeing abdominal surgeon to rule out anal fistula.
Please keep in mind that I provide with medical information only. I am not able to diagnose medical conditions online. Please contact you doctor or other healthcare provider such as abdominal surgeon for further advice, diagnosis and treatment options.
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