Sun exposure is a natural medicine.
Conversely, although many MS patients cannot tolerate high temperatures, some report that cooler sunny days make them feel much better and lessens the effects of symptoms. This could be because the body is making vitamin D from the sun’s rays.
The body reacts to flying.
There have been reports of MS relapses during long-haul flights. There isn’t any medical evidence to suggest why this is happening, and researchers have yet to prove whether it’s due to altitude or being in a confined space for a long period of time.