<unk>  (also known as<unk> 's syndrome,<unk> 's sign, and<unk> 's symptom) is the worsening of neurologic symptoms in multiple sclerosis (MS) and other demyelinating diseases when the body is overheated. This may occur due to hot weather, exercise, fever, saunas, hot tubs, hot baths, and hot food and drink. Increased temperature slows nerve conduction, but the exact mechanism remains unknown. With an increased body temperature, nerve impulses are either blocked or slowed in a damaged nerve. Once the body temperature is normalized, signs and symptoms typically reverse.
Uhthoff's phenomenon
Lucio's phenomenon
Bell's phenomenon
Renbök phenomenon
Kohnstamm's phenomenon
Jod-Basedow phenomenon
Tullio phenomenon
Waddell's signs