Occult Blood

What Causes Occult Blood?

Occult blood can have various causes, just like most other symptoms.  Finding the true cause means ruling out or confirming each possibility – in other words, diagnosis.

Diagnose your symptoms now!
  • understand what's happening to your body
  • have a doctor review your case (optional)
  • learn what you should be doing right now

Diagnosis is usually a complex process due to the sheer number of possible causes and related symptoms.  In order to diagnose occult blood, we could:

  • Research the topic
  • Find a doctor with the time
  • Use a diagnostic computer system.
The process is the same, whichever method is used.

Step 1: List all Possible Causes

We begin by identifying the disease conditions which have "occult blood" as a symptom.  Here are eight of many possibilities:
  • Stomach Cancer
  • Crohn's Disease
  • Rectal Cancer
  • Ulcerative Colitis
  • Colon Cancer
  • Carcinoid Cancer
  • Small Intestine Cancer
  • Stomach Ulcers

Step 2: Build a Symptom Checklist

We then identify all possible symptoms and risk factors of each possible cause, and check the ones that apply:
occasional unexplained fevers
dizziness when standing up
regular episodes of diarrhea
weak appetite
history of colon cancer
slight abdominal distension
stomach cancer
highly elevated lymphocyte count
chronic nausea
colon cancer
severe upper-right pain after food
meals worsen epigastric pain
... and more than 80 others

Step 3: Rule Out or Confirm each Possible Cause

A differential diagnosis of your symptoms and risk factors finds the likely cause of occult blood:
Cause Probability Status
Ulcerative Colitis 95% Confirm
Small Intestine Cancer 24% Unlikely
Stomach Ulcers 20% Unlikely
Stomach Cancer 4% Ruled out
Carcinoid Cancer 0% Ruled out
Crohn's Disease 0% Ruled out
Rectal Cancer 0% Ruled out
Colon Cancer 0% Ruled out
* This is a simple example to illustrate the process

Arriving at a Correct Diagnosis

The Analyst™ is our online diagnosis tool that learns all about you through a straightforward process of multi-level questioning, providing diagnosis at the end.

If you indicate having had recent lab tests, The Analyst™ will ask further questions including this one:
Occult blood. Have lab tests found blood in your stool within the past 6 months?
Possible responses:
→ Not tested within past 6 months / don't know
→ No, stool tested negative
→ In the past only, now resolved
→ Yes, trace or small amounts
→ Yes, enough for doctor to be concerned
Based on your response to this question, which may indicate absence of occult blood, history of occult blood, trace amounts of occult blood or significant amounts of occult blood, The Analyst™ will consider possibilities such as:
... and also rule out issues such as:
Concerned or curious about your health?  Try The Analyst™
Symptom Entry
Symptom Entry
Diagnosis
Diagnosis
Suggestions
Suggestions
LifeMeter
LifeMeter®
Full Explanations
Explanations
Optional Doctor Review
Review (optional)