Grooves Across Fingernails

What Causes Ridges Across Fingernails?

Ridges across fingernails 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!
  • check your overall health status
  • have a doctor review your case (optional)
  • identify any nutritional deficiencies

Diagnosis is usually a complex process due to the sheer number of possible causes and related symptoms.  In order to diagnose ridges across fingernails, 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 "ridges across fingernails" as a symptom.  Here are two possibilities:
  • Zinc Need
  • Psoriasis

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:
darker/redder skin color
genital sores
iron supplementation
diuretic use
loss of appetite
pitted nails
absent sexual desire
adult acne
PPI antacid use
coffee consumption
disturbed sleep
... 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 ridges across fingernails:
Cause Probability Status
Psoriasis 91% Confirm
Zinc Need 66% Possible
* 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 abnormal fingernails and toenails, The Analyst™ will ask further questions including this one:
Do your fingernails have ridges or grooves going from side to side, across the direction of growth?
Possible responses:
→ No / don't know
→ A few / minor
→ Many / pronounced
Based on your response to this question, which may indicate grooves across fingernails, The Analyst™ will consider possibilities such as:

Nail abnormalities are a possible symptom of psoriasis.

Concerned or curious about your health?  Try The Analyst™
Symptom Entry
Symptom Entry
Full Explanations
Optional Doctor Review
Review (optional)
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