Causes of female sinus arrhythmia include physiological factors, disease factors, drug factors, etc. 1. physiological factors: for example, staying up late, emotional excitement, strenuous exercise, etc., may trigger female sinus arrhythmia. 2. Disease factors: such as anemia, hyperthyroidism, pericarditis, myocardial infarction and other diseases, can trigger changes in the heart rhythm. This can lead to sinus arrhythmia in women. 3. Drugs: Digoxin, for example, can also trigger sinus arrhythmia in women. Sinus arrhythmia in women can be asymptomatic, but there may be chest tightness, rapid heartbeat with panic, dizziness and other manifestations; patients need to consult the cardiovascular medicine department under the guidance of the doctor to take reasonable treatment, so as not to affect the individual’s health.