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:
moderate afternoon/evening fatigue
poor cold weather tolerance
major fatigue for 3-12 months
moderate unexplained weight gain
frequent postprandial somnolence
major swelling at front of neck
bags under eyes
minor joint pain/swelling/stiffness
having non-scalp scaly/flaky skin
... 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.