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October 7, 2026

9 types of persistent itching that could signal a health problem

6 weeks
The threshold beyond which medical experts formally classify itching as chronic, at which point identifying an underlying cause becomes increasingly important.

Itching that is persistent, widespread, or accompanied by systemic symptoms such as fatigue, weight loss, or yellowing of the skin is the kind that health experts say should not be left unexplained. Identifying the underlying cause early — whether it turns out to be a thyroid imbalance, a liver condition, or something else entirely — is precisely what a timely medical evaluation is designed to do.

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