Can Jet Lag cause you to feel sick?

As we know there are a number of symptoms of jet lag.

These may include:

	Feeling of extreme fatigue
	Disorientation
	Inability to concentrate
	Insomnia
	Ear aches
	Sore throats
	Swollen feet
	Nausea and vomiting
	Impaired vision
	Impaired coordination
	Sweaty palms
	Diarhhea
	Some form of memory loss

However some of these may also be attributed just to the mode of travel.

For example, some people have aches in their ears whilst travelling on pressurised cabins in the airplanes. This happens particularly during a plane taking off or going into descent.

The discomfort is caused by the middle ear trying to equalize the pressure in the ear during take-off or landing. A common way to get over this is to use ear muff and/or to try swallowing.

Another sickness that can arise is travel or motion sickness.

Motion is caused by different signals coming into the brain from  the eyes and ears that do not match over all. For example the ears might detect movement, but the eyes that are focused on an internal object - may not. This results in sending a conflicting signal to the brain.

The result of these mixed signals could cause vomiting, dizziness and or nausea.

In these instances, the sickness has been caused by factors others jet lag. So whilst jet lag can seem to be the cause of sickness, it may not always be the case.

Overall though, there is no doubt that the  jet lag can cause discomfort.