Multiple Sclerosis Pain and Lhermitte’s Sign 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 sign, or barber chair sign, and it’s often one of the symptoms that people mention when they’re first diagnosed with multiple sclerosis.

The problem can be painful, but it’s not life-threatening. With time or with treatment, some people stop having Lhermitte’s sign.

Looking and Feeling Good With MS