What is morning sickness?

I have been pregnant for one or two months now. My friend asked me if my morning sickness was serious. I would like to know what is morning sickness?

Early pregnancy reaction refers to the increase of estrogen and progesterone levels in women after pregnancy, which will cause a series of clinical reactions to the body, such as menopause, morning vomiting, vomiting, lethargy, anorexia Greasy, fatigue, loss of appetite and other symptoms; also manifested as backache, frequent urination, breast tenderness, breast enlargement, dizziness, chills, etc. However, because each pregnant woman has certain individual differences, some pregnant women will not have obvious pregnancy reactions during pregnancy, which is a normal phenomenon. Don't worry, just go to the hospital for regular check-ups.