Grumpiness and irritability in early pregnancy are mainly caused by the following reasons: First, the most important reason is the rapid change of sex hormones when you are just pregnant, endocrine disorders sometimes occur, and it is easy to have emotional instability, such as grumpiness, sensitivity and even special concern for every move of your lover and people around you, and you will make a big fuss with people because of very small trivialities. Secondly, it may be that during pregnancy, especially at the beginning of the pregnancy, there is a special anxiety about the future birth of a child, and even not yet able to accept the physical changes as well as changes in work and career. It is easy to be sensitive, suspicious, anxious, irritable and even grumpy if your mind is not adjusted. Thirdly, there may be tension between mother-in-law and daughter-in-law and discord between husband and wife in the early stages of pregnancy, which can easily make pregnant women unstable and even prone to quarrel with others. Fourth, there are also some pregnant people may not be able to accept the changes in the body, such as the body gradually gain weight, or can not accept the current changes in life, such as can not go out to play, drink, stay at home all day is easy to make pregnant women emotional problems, such as depressed mood, happy not up, anxiety, irritability, etc., these problems are easy to make pregnant women grumpy, all of the above reasons are more common.