When pruritus occurs as a symptom of multiple sclerosis, it is similar to other neurologic sensations - pins and needles, burning, stabbing, or tearing pain - known as dysesthesias. The itching with MS is often paroxysmal (coming on suddenly with great intensity) but temporary in nature and lasting anywhere from a couple of seconds to minutes. It can even seem to get worse the more you scratch.
Heat triggers pruritus for some people with MS and for others, it seems to be related to movement or tactile stimulation. For some reason, the itching often occurs at night with an intensity that has the power to wake you up from sleep.
Other causes of MS-related itching may include temporary skin irritation following injections, allergic reaction to medication, or side-effect of medication. In clinical trials, one of the common side effects of the oral medication dimethyl fumarate (Tecfidera) was flushing, followed by the sensation of heat or itching.
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MS Signs vs Symptoms: What is Pruritus?
(Photo credit: "Scratching her head" by Tambako is licensed under CC BY-ND 2.0)
See also:
Treatment for MS-Related Itching
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