Around 25% of women will develop carpal tunnel syndrome during their pregnancy in both hands. This is typically caused by the retention of fluid and swelling that is very common during pregnancy. Pressure from fluid can cause pressure on the median nerve. The median nerve gives feeling to the thumb, index, middle and half of the ring finger and is what controls movement in the muscle at the base of the thumb. The pressure causes numbness, tingling, burning, pain and sometimes a dull ache in your fingers, hand, and wrist and sometimes up the arm. You may have weakness in your hand.
To treat carpal tunnel during pregnancy your doctor may recommend that you prop your arm up with a pillow while you are sleeping. Avoid sleeping on your hands and if you wake up with pain or numbness try gently shaking your hands until the sensation goes away.
You can also stabilize your wrist in a splint in a neutral position. This can help widen the carpal tunnel and alleviates pressure on the nerve. When typing you should make sure your wrists are bent downward. Try to avoid repetitive hand movements because they can worsen the condition. Wearing braces while tying or working (if it requires repetitive hand movements) can help as well.
Most times, carpal tunnel syndrome during pregnancy will resolve after delivery. Be sure and talk with your doctor if you are having any of the symptoms of carpal tunnel syndrome.