Lhermitte’s sign is a short, intense, electric-shock like sensation that passes down the neck and spine and radiates through the trunk and limbs. It is a symptom of multiple sclerosis (MS) but can ...

Lhermitte sign is a sudden, uncomfortable sensation that travels down the neck to the spine when flexing the neck. It can be a symptom of conditions affecting the spinal cord, like multiple sclerosis.

It lasts just a few seconds, but it can be startling: An intense burst of pain like an electric shock that runs down your back into your arms and legs when you move your neck. It’s called Lhermitte’s ...