Even though many people call it "morning sickness" is does have many other names, including:
The chart to the right shows the top sources of nausea in the morning. As you can see morning sickness associated with pregnacies makes up nearly ¾ of morning nausea cases, however other issues can make you feel ill in the morning.
So why do people feel ill in the morning and not at other times of the day? The is because when body has been at rest for several hours (as we sleep), it causes an increase in hormone levels which puts excess stress on our body and digestive system in the morning hours.
Since everyone's body is different it is recommended you seek the advice of a professional if you've been suffering from morning sickness regularly and are not pregnant.
Generally morning sickness starts Learn more about when morning sickness starts. 6 weeks after you get pregnant, however some people can experience nausea before their missed period.