Missing outer third of eyebrows can have various causes, just like most other symptoms. Finding the true cause means ruling out or confirming each possibility – in other words, diagnosis.
Diagnosis is usually a complex process due to the sheer number of possible causes and related symptoms. In order to diagnose missing outer third of eyebrows, 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 "missing outer third of eyebrows" as a symptom. For example, hypothyroidism.
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:
bags under eyes
poor cold weather tolerance
very low HDL cholesterol level
difficulty losing weight
premenstrual weight gain
fair recovery from exertion
reduced sense of smell
depression with anxiety
major fatigue for 3-12 months
... and more than 30 others
Step 3: Rule Out or Confirm each Possible Cause
A differential diagnosis of your symptoms and risk factors finds the likely cause of missing outer third of eyebrows.
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 Eyes/Ocular Symptoms section of the questionnaire, The Analyst™ will ask the following question about missing outer third of eyebrows:
Does the outside 1/3 of your eyebrow area have little or no hair growth? In other words, do your eyebrows fail to extend out to edge of your eyes?
→ No / don't know
Based on your response to this question, which may indicate missing outer third of eyebrows, The Analyst™ will consider possibilities such as Hypothyroidism.