Acute Effect of Topical Menthol on Carpal Tunnel Syndrome

Acute Effect of Topical Menthol on Pain Symptoms in Slaughterhouse Workers With Symptoms of Carpal Tunnel Syndrome: Randomized Controlled Trial

Topical menthol gels are classified 'topical analgesics' and are used to relieve pain of the musculoskeletal system. However, double-blind randomized controlled trials are lacking. Here the investigators examine - in a double-blind randomized controlled cross-over trial - the acute effect of topical menthol (Biofreeze) and placebo (gel with a menthol scent) on pain symptoms in slaughterhouse workers with symptoms of Carpal Tunnel Syndrome.

Inclusion Criteria:

• positive Phalen test
• positive Tinel test
• nocturnal hand/wrist pain
• pain intensity of at least 4 in the hand/wrist
• the pain should have lasted at least 3 months

Exclusion Criteria:

• pregnancy
• life-threatening disease