Your Usual Urine Color

What Causes Light Or Dark Urine?

Light or dark urine can have various causes, ranging in severity from 'needs attention' to 'very serious'.  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 light or dark urine, 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 "light or dark urine" as a symptom.  Here are seven possibilities:
  • Gallbladder Disease
  • Hepatitis
  • Dehydration
  • Porphyria
  • Ochronosis / Alkaptonuria
  • Hemolytic Anemia
  • Chronic Fatigue-Fibromyalgia

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:
frequent swollen inguinal nodes
severe meal-induced pain
mild right lumbar discomfort
eleven or more tender points
multiple swollen cervical nodes
regular unexplained nausea
poorly controlled diabetes
insufficient water consumption
chronic nausea
frequent unexplained vomiting
history of low back pain
tinnitus
... and more than 120 others

Step 3: Rule Out or Confirm each Possible Cause

A differential diagnosis of your symptoms and risk factors finds the likely cause of light or dark urine:
Cause Probability Status
Dehydration 91% Confirm
Chronic Fatigue-Fibromyalgia 24% Unlikely
Ochronosis / Alkaptonuria 12% Unlikely
Porphyria 4% Ruled out
Hemolytic Anemia 1% Ruled out
Hepatitis 0% Ruled out
Gallbladder Disease 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.

In the Urinary Symptoms section of the questionnaire, The Analyst™ will ask the following question about your usual urine color:
What is the usual color of your urine, ignoring supplement (B-vitamin) yellowing, medications you are taking or other obvious factors?
Possible responses:
→ Don't know
→ Colorless
→ Light Yellow
→ Dark Yellow
→ Very dark or black
Based on your response to this question, which may indicate clear urine color, light urine color or dark urine color, The Analyst™ will consider possibilities such as:
Ochronosis / Alkaptonuria

Although a very rare disease, the main outward symptom of ochronosis is black urine.

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