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In the 19th and early 20th centuries, the effects of heat on people with MS were used in the diagnosis of the condition. The hot bath test involved lying in a bath of warm water. If this caused or worsened neurological symptoms, it was taken as evidence that the person had multiple sclerosis.

This test has not been used for many years.

Last reviewed: 27 April 2016
This page will be reviewed within three years