Sinus arrhythmia is a very common symptom, many people will show sinus arrhythmia, sinus arrhythmia is mainly seen in general healthy people, pregnant women show arrhythmia, many are physiological, some women in the first trimester of pregnancy will be more obvious, mainly due to endocrine dysfunction, resulting in plant nervous dysfunction caused, is a normal manifestation of early pregnancy, do not It is a normal manifestation of early pregnancy and does not require special treatment. If pregnant women drink strong tea, coffee and other drinks during pregnancy, it is possible that the excitatory effect of theophylline or caffeine may cause arrhythmia.