Precipitating Factors :
Consider infectious causes :
Has the patient eaten any food that she thinks may have been contaminated or infected ?
Has anyone else she knows had a similar problem?
Has she been abroad recently ?
Clues to specific intestinal infections in patients presenting with diarrhea is shown in the Table below :
Ask about medications :
Has she taken any antibiotics recently that predisposed to C . Difficile?
Has she taken NSAIDS : These are potent causes of colonic irritation and bloody diarrhea.
Other history
Past Medical History
Any past diseases of Bowel problems ?
Could this be a flare up of Inflammatory Bowel Disease ?
Could this be a result of post radiotherapy / Radiation colitis ( can cause bleeding from bowel )?
Any past history of bowel surgery ?
Any pother bowel pathology >?
In elderly arteriopath , sudden onset of pain in abdomen and bloody diarrhea can be due to ischaemic coloitis .
In case of diagnosis is not apparent , taking a detailed sexual history to exclude STI and HIV may be necessary.
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