When a woman is pregnant for about 6 weeks, the levels of human chorionic gonadotropin, estrogen and progesterone in her body will gradually increase, and when the level of these hormones rises to a certain height, it will trigger a series of early pregnancy reactions, such as nausea, vomiting, aversion to greasy food, preference for acid, drowsiness, weakness, dizziness, headache and swelling. Generally speaking, these symptoms are not serious and will disappear naturally in about 12 weeks of pregnancy, so no special treatment is needed. During early pregnancy, it is recommended that women must pay attention to rest and not to work too hard, and if they are too nervous, anxious or depressed, they should relieve these bad emotions as soon as possible to help reduce early pregnancy reactions. It is recommended to eat more fresh vegetables and fruits as well as multivitamins during early pregnancy, which is also helpful to relieve early pregnancy reaction.