There is a relationship between severe pregnancy vomiting and physical condition. After pregnancy, the hormone level in the body will be very high, the hormone level mainly refers to estrogen, progesterone, lactogen, etc. These series of hormones will act on the smooth muscle of the gastrointestinal tract, making the smooth muscle of the gastrointestinal tract have spasms, so it causes a series of discomfort in the gastrointestinal tract, such as nausea, vomiting or constipation, etc. These are all normal early pregnancy reactions. Some people have very mild vomiting, but some people have very strong vomiting, which is related to the individual’s physical condition and the level of hormones in the body. If a person’s body is weak and the hormone level in the body is very high, some people will have very strong pregnancy vomiting.