Carpal tunnel syndrome occurs when the median nerve becomes compressed as it goes through your wrist. The median nerve travels down your arms and into your hands. It passes through the bones in your wrist using a narrow space called the carpal tunnel.
The carpal tunnel is a rigid space that’s surrounded by bone, and the nerve shares the space with numerous tendons. When any of the soft tissues inside the tunnel become inflamed, or when there’s damage to the bone, the carpal tunnel narrows and pinches the nerve, causing carpal tunnel syndrome.
In rare cases, you may have a smaller-than-normal wrist that increases your risk of developing carpal tunnel syndrome. In most cases, however, the condition is caused by:
Changes in hormones during pregnancy and menopause make women more susceptible to carpal tunnel.
Carpal tunnel syndrome usually develops slowly, so the symptoms sneak up on you. When symptoms first appear, they’re so mild you may not pay attention to them. As the condition worsens, you’ll experience:
It’s also common to develop a tingling or pins-and-needles sensation that radiates from your wrist to your thumb, index, and middle fingers.