Odd incident with sudden symptom

Patient

Q: 3 days ago a vertical groove suddenly appeared on my fingernail after I pressed on a tiny tiny cyst on it's cuticle. The cyst flattened out immediately. What could it mean? I'm 60 and in very good health.

Symptoms:  Just that the groove is kind of deep. The fact that it was sudden has me worried that it may be a sign or symptom of something else.
Doctor

A:   This question is currently in queue and will be answered shortly by one of our doctors. In the meantime you may browse our library of answered questions by clicking here.

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