Numbness in Left Hand

Numbness, which is medically known as paresthesia, refers to a partial or complete lack of sensation in any part of the body. This could be a symptom of a variety of medical conditions that may or may not be of a serious nature. More often than not, paresthesia is associated with poor blood circulation or a pinched nerve. Whenever blood is unable to reach a particular part of the body, especially the arms or the legs, it causes that particular body part to go to sleep. So, numbness could result if sufficient amount of blood is unable to reach the hand and the fingers. This occurs when your hand is placed in an awkward position that limits the flow of blood to the hand (due to the force of gravity), or if you place a heavy object (or even your body) on the hand. Under such circumstances, correcting one's position would cause the blood flow to that body part to return to normal. However, if there is a constant sensation of numbness in left hand or if this sensation returns at regular intervals, it would be best to seek medical help for identifying the underlying cause of numbness.


While poor blood circulation is often a common contributory factor for numbness or the pins-and-needles sensation, paresthesia could also be caused by other medical conditions. Here's some information on the circumstances under which one may experience a tingling sensation in the left hand.

Carpal Tunnel Syndrome
Carpal tunnel syndrome is a repetitive stress motion disorder that is often responsible for causing numbness in the hands or fingers. Carpal tunnel is a small passageway in the wrist through which the median nerve passes. This nerve runs from the forearm to the hand. It carries sensory fibers as well as motor fibers. It facilitates the movement of the wrist. It also provides the sensations that are felt around the wrist. Entrapment or compression of this nerve could therefore be responsible for causing numbness in the fingers, hands or arms. A multitude of factors could lead to carpal tunnel syndrome. Repetitive hand movements or wrist injuries are the most common contributory factors for this medical condition. Hairdressers, carpenters and musicians ( those who play musical instruments) are at a greater risk of developing this condition. If the nature of your work involves excessive use of computers, you are also susceptible. Obesity, diabetes, rheumatoid arthritis, hypothyroidism and pregnancy also figure among the risk factors. If the left hand is affected by this condition, one is most likely to experience tingling and numbness in the middle finger, index finger, thumb and the palm of the left hand.

Compression of the Ulnar Nerve
The ulnar nerve is one of the main nerves that pass through the arm. It passes through the cubital tunnel, running under the medial epicondyle on the inner side of the elbow. A compressed ulnar nerve can certainly cause numbness in hand. Accumulation of fluid in the elbow region could cause swelling which in turn may cause entrapment of this nerve. Repetitive movements wherein the elbow is bent could cause ulnar nerve entrapment. Elbow injuries, development of bone spurs or cysts near the elbow joint could also make one susceptible. Sleeping with the elbow in a bent position could also give rise to numbness. The ulnar nerve carries the sensory fibers and provides sensation to the ring finger and the little finger. A compressed ulnar nerve could therefore cause a tingling sensation in these fingers. If the nerve stays compressed for a long time, the affected individual may find it hard to grip objects. In severe cases, finger coordination is affected.

Nerve Damage
In some cases, numbness can be indicative of nerve damage. Numbness in hands and feet due to nerve damage is medically referred to as peripheral neuropathy. Trauma or pressure on the nerves could cause this condition. Poor lifestyle choices could also make one susceptible. Alcoholism and poor dietary habits could put one at an increased risk of developing this condition. Development of tumors, diabetes, vitamin deficiencies, kidney problems, liver disease, thyroid disorders, exposure to toxins, autoimmune disorders and certain inherited diseases could make one susceptible to developing peripheral neuropathy. Besides numbness or a tingling sensation in hands and feet, one may also experience a sharp pain, increased sensitivity to touch and lack of coordination.

Circulatory or Neurological Condition
For many people, the numbness in left hand stems from a far more deeply entrenched health problem, that may be associated with the circulatory system or the nervous system. For instance, there could be a major defect in the body that could also cause a stroke or a heart attack. If the numbness strikes the person's hand and arm very suddenly, and the pain slowly starts spreading and refuses to go away, one must seek medical assistance immediately as these are the most definite signs of an impending stoke. A stroke is a life-threatening situation, so due care must be taken.

This was some information on the common causes of numbness in hand. If numbness is accompanied by pain and difficulty in moving the affected hand, one must consult a doctor at the earliest. Once the underlying cause is ascertained, drug therapy coupled with self-care measures will certainly help to alleviate the symptoms. Massage therapy may also prove beneficial. Do make the necessary dietary changes and refrain from indulging in any activity that may put strain on the affected hand. If your work involves typing or anything involving repetitive hand movements, do take breaks at regular intervals. Sleeping in a wrong posture can also cause compression of nerves, so do correct your sleeping posture.