Carpal tunnel syndrome is typically accompanied by pain, numbness and reduced mobility in the hands and wrists. Research published by the Tehran (Iran) University of Medical Sciences in the DARU Journal of Pharmaceutical Sciences has determined that the application of external linseed oil—also referred to as flaxseed oil—can reduce pain and increase mobility for syndrome sufferers.

The research tested 100 patients with the condition in two groups—one rubbed placebo oil onto their wrists, while the other applied linseed oil daily over a four-week period. Both groups wore wrist splints at night.

After the treatment period, those that applied linseed oil experienced a significant drop in pain scores using the Boston Carpal Tunnel Questionnaire and Function Assessment. The same patients also reported an improvement in mobility and function.