Fact · Accessibility and health
In severe carpal tunnel syndrome, skin sensation can be permanently reduced and compression can cause muscle wasting at the base of the thumb, according to the 2024 Cochrane review.
Checked against its source on October 16, 2026
In the source's own words
“In severe cases, skin sensation can be permanently diminished and compression may cause muscle wasting at the base of the thumb.”
Surgical versus non-surgical treatment for carpal tunnel syndrome, V Lusa et al., Cochrane Database of Systematic Reviews, 2024, What is carpal tunnel syndrome?.
Open the original (DOI 10.1002/14651858.CD001552.pub3)- What it measures
- This is why persistent numbness or thumb weakness is a reason to see a clinician early.
- What it does not show
- Describes severe cases; mild symptoms do not usually reach this stage.
Source
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