Lhermitte s phenomenon or the Lhermitte phenomenon sometimes called the barber chair phenomenon, is an electrical sensation that runs down the back and into the limbs. The sensation can feel like it goes up or down the spine. It is generally considered uncomfortable. In many patients, it is elicited by bending the head forward. It can also be evoked when a practitioner pounds on the posterior cervical spine while the neck is flexed; this is caused by involvement of the posterior columns. It is sometimes called Lhermitte s sign, though this is technically incorrect as a sign is something that can be observed on examination whereas a symptom is the subjective experience. Lhermitte s phenomenon is subjective and therefore a symptom. It is most commonly seen in 1.cervical spodylosis 2.multiple sclerosis 3.subacute combined degeneration of spinal cord Dear patient better to consult your neurosurgeon He will guide you in better way. My opinion is better to relive the compression of your spinal cord.