4. Health Conditions
In some cases, vertical ridges may indicate underlying health issues, including poor circulation, thyroid imbalance, or rheumatoid arthritis. If you also notice fatigue, brittle hair, or skin changes, it’s worth speaking with a doctor.
When Should You Worry?
Vertical ridges are usually harmless, but you should seek medical attention if you notice:
Splitting, peeling, or thickening nails
Pain, swelling, or inflammation around the nail
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