That sound like it could either be IBS, or hemmroides. IBS, is where your bowl isn't normal and you have problmes keeping regular (constipation or diahhrea) and cramps are also a symptom of IBS! Then it could also be internal hemmroids. So when you strain, mucas can come out! There's a mucas lining inside your intestines, so it could be somehing to do with that. But, when in doubt, go and see a doctor.
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china
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