Pregnant people’s temperament is easily affected by the body’s hormone levels and the surrounding external environment, the mood fluctuations are greater, and some may be particularly irritable. After a woman becomes pregnant, in the early stages of pregnancy, the hormone level in the body undergoes great changes, compared with the pre-pregnancy level rises significantly, and some of them will have obvious early pregnancy reactions, such as nausea, vomiting, dizziness, fatigue, etc., and their moods are greatly affected by the hormone level and the external environment, and their moods are unstable, and they may be particularly grumpy. As the weeks of pregnancy increase, the fetus gradually increases in size, especially in the late stages of pregnancy, the burden on the heart increases, there may be panic, shortness of breath, chest tightness, abdominal distension, abdominal pain and other uncomfortable symptoms; the emergence of a number of pregnancy-related complications during pregnancy, which will adversely affect the health of the mother and child, and the resulting mood of the pregnant woman may have a great impact. Therefore, it is possible for a pregnant person to be particularly short-tempered, and when this occurs, prompt medical attention should be sought.