Generally finger numbness is a result of conditions that affect nerves and/or blood vessels that supply the fingers. It is also associated with tingling. It need to be sorted out if the problem associated with only left thumb. Frequent symptoms are referred as finger paresthesia.
cause they aren't real
There are several. Neck conditions where the nerve is pinched by bulging disc or disc rupture can sometimes cause localized numbness and tingling in the hands and fingers. Radial neuritis is inflammation of the radial nerve which travels down the forearm and into the thumb and index finger causes symptoms of ache, pain, tingling sens. Ulnar neuritis which some people call the carpal tunnel of the elbow, can cause numbness and tingling of the 3rd and 4th fingers. Tendonitis in the hand can cause throbbing,achey pain in the hands and fingers as well.
Pain or numbness appears in the thumb and fingers, although the cause is farther up the arm, where the median nerve passes through the carpal tunnel from the wrist to the upper hand.
cut it off
Pinched nerve in shoulder or c-spine
What has four fingers and a thumb, but is not alive, is a popular riddle. The answer is a glove.
When you touch a hot surface, it can cause damage to the nerves in your thumb, leading to temporary numbness. This is a protective mechanism to prevent further damage to your skin. The numbness usually subsides as the nerves recover from the initial shock.
A Glove!
Pain in carpal tunnel syndrome is most frequently felt on the palm side of the wrist and may radiate up to the elbow or shoulder or down to the fingers. Numbness in the fingers is also common, especially the thumb and forefinger, but not the pinky.
Thumb numbness is commonly associated with the median nerve, which runs down the arm and into the hand. This nerve is responsible for sensation in the thumb, index finger, middle finger, and part of the ring finger. Compression or irritation of the median nerve, often seen in conditions like carpal tunnel syndrome, can lead to numbness and tingling in the thumb. Other potential causes of thumb numbness may include issues with the radial or ulnar nerves, but the median nerve is the most frequently linked.
It may result from damage to the nerves supplying the thumb or from damage to or occlusion of the blood supply somewhere higher up the arm. Severe damage to the thumb itself may also cause considerable loss of sensitivity. Theoretically, at least, it might also be caused by damage to the opposite side of the brain, but in such cases, the numbness will probably affect a wide range of regions of the arm and shoulder. In a dumb bum, too much rum could also cause a numb thumb--among other things!:-)