Tingling in the hands may be harmless or indicate diseases

Who has never felt tingling in the hands? You bang your elbow on a wall and then you notice a tingling or shock in your hand, usually involving the fourth (annular) and fifth finger (pinky). Or after a long run on a cold day the same thing: tingling hands. Finally, you have your arms raised for a long time, and again your fingers will tingle.

There are several situations that occur with tingling in the hands, most without a clinical significance. However, it is necessary to watch out for neurological causes of tingling. But first, how do we define tingling? For the neurologist, tingling is a "feeling without stimulus." As well? The individual has a normally unpleasant sensation, for example, in the hands, but which occurs in the absence of a local mechanical stimulus, eg touch. Technically, tingling is what we call "paresthesia."

Although there are tingling causes that do not pose a problem, a good recommendation would be to seek medical help whenever the symptom does not improve on its own or there is no obvious justification for its origin.

Among the main neurological causes of "paresthesias" in the hands are those secondary to the involvement of the peripheral nerves, which originate in the spinal cord, in the sensory and motor nerve roots, form plexuses (a group of nerve trunks) and later terminate in the nerves themselves, for example the radial nerve, median nerve, or ulnar nerve. Nerves are structures that carry information from the periphery to the central nervous system (CNS), but also convey information from the CNS to the periphery. Diseases such as diabetes, kidney problems, thyroid disorders and vitamin deficiencies are known metabolic causes of tingling, due to peripheral nerve involvement.

Inflammatory diseases such as vasculitis (inflammation of vessels) can also be a tingling cause. Local trauma from any type of accident and, finally, infections can also trigger "paresthesias". On peripheral nerve infections, leprosy, caused by a bacillus from the same family as the tuberculosis bacillus, is still a concern.

It is important to remember that tingling in the hands may be bilateral or unilateral, symmetrical or asymmetric, acute or chronic. Although there are tingling causes that do not pose a problem, a good recommendation would be to seek medical help whenever the symptom does not improve on its own or there is no obvious justification for its origin.

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