Carpal tunnel syndrome is caused by pressure on a nerve (the median
nerve) in the wrist. The symptoms include tingling, numbness, weakness, or pain
felt in the fingers, thumb, hand, and sometimes into the forearm.
Conditions that may contribute to the development of carpal tunnel
syndrome include pregnancy, hypothyroidism, diabetes, arthritis, and obesity.
Improper or prolonged use of the hands or wrist can also put pressure on the
median nerve by causing swelling or thickening of tissues close to or within
the carpal tunnel. Prior wrist injuries (especially fractures) make a person
more likely to develop carpal tunnel syndrome.
Both work and recreational activities can cause carpal tunnel
syndrome if done over a long period of time. Some of these activities
include:
- Typing, data entry, use of a computer mouse, or
bar code scanning.
- Use of tools, especially those that vibrate
(such as sanders).
- Prolonged knitting or
needlework.
- Prolonged twisting of the wrist.
Carpal tunnel syndrome can often be treated by avoiding activities
that irritate the wrist, applying ice, wearing a night splint, and taking
anti-inflammatory medications. Avoiding caffeine, alcohol, and tobacco may
help. Strengthening the arms and shoulders and increasing vitamin B6 intake may
also help. In some cases, surgery may be helpful.
