It is very common for pregnant women to have a rapid heart rate, and there are many reasons for this. After pregnancy, the pregnant woman’s body will have a lot of changes, the body’s hormone secretion will increase than usual, which will make the body’s body temperature relatively higher, the body temperature will also make the pregnant woman’s heart rate has a certain increase, which is one of the factors of the pregnant woman’s accelerated heart rate. After pregnancy, due to the gradual development of the fetus, nutrients and blood circulation needs, there are great changes, which will increase the burden on the heart of pregnant women, will compensate for the symptoms of accelerated heart rate, which is the main reason for accelerated heart rate after pregnancy, usually pay attention to rest, avoid overexertion, but also frequently monitor blood pressure, heart rate, to avoid the emergence of gestational hypertension or heart failure. It is also important to monitor blood pressure and heart rate frequently to avoid the possibility of hypertension or heart failure during pregnancy. The main reason for this is that the increased burden on the heart is related to the reduced ability to tolerate the usual activities, so it is easier to have a faster heart rate. If the heart rate increases during pregnancy, it is necessary to exclude other organic diseases, more common is hyperthyroidism, this situation needs to go to the hospital in time to do the ultrasound of the thyroid gland and thyroid function test to clarify, if there is hyperthyroidism, it is necessary to carry out standard drug treatment under the guidance of endocrinologist. It is very common for pregnant women to have an accelerated heart rate. First of all, they should relax, take regular rest and avoid exertion and cold, and have regular maternity checkups if their symptoms are obvious.