Bleeding Between Periods

What Causes Bleeding Between Periods?

Bleeding between periods can have various causes, ranging in severity from 'troubling' to 'generally fatal'.  Finding the true cause means ruling out or confirming each possibility – in other words, diagnosis.

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Diagnosis is usually a complex process due to the sheer number of possible causes and related symptoms.  In order to diagnose bleeding between periods, 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 "bleeding between periods" as a symptom.  Here are eight possibilities (more below):
  • Ovarian Cancer
  • Low Progesterone
  • Adrenal Fatigue
  • Hypothyroidism
  • Ovarian Cysts
  • Fibroids
  • Endometrial Hyperplasia
  • Endometriosis

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:
regular postprandial somnolence
low diastolic blood pressure
intermittent abdominal fullness
regular unexplained nausea
dizziness when standing up
pear-shaped body when overweight
often/always feeling unusually cold
premenstrual weight gain
low T3 free level
non-vaginal candidiasis
painful deep penetration during sex
... and more than 140 others

Step 3: Rule Out or Confirm each Possible Cause

A differential diagnosis of your symptoms and risk factors finds the likely cause of bleeding between periods:
Cause Probability Status
Ovarian Cysts 90% Confirm
Endometriosis 24% Unlikely
Adrenal Fatigue 20% Unlikely
Endometrial Hyperplasia 3% Ruled out
Hypothyroidism 1% Ruled out
Fibroids 0% Ruled out
Low Progesterone 0% Ruled out
Ovarian 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 being premenopausal or being perimenopausal, The Analyst™ will ask further questions including this one:
Do you have bleeding between periods?
Possible responses:
→ Don't know
→ No
→ Occasionally / moderately
→ Often / severely
Based on your response to this question, which may indicate either absence of bleeding between periods or bleeding between periods, The Analyst™ will consider possibilities such as:
Endometrial Cancer

The most common sign of endometrial cancer is unusual bleeding from the vagina, especially bleeding that occurs after passing through menopause.


Prolonged and/or heavy periods are a sign of hypothyroidism.

Concerned or curious about your health?  Try The Analyst™
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