Wrist sphygmomanometers have some deviations from arm sphygmomanometers, but the error is not large under normal circumstances. Wrist sphygmomanometers are convenient to measure and have a high usage rate, but the results of this sphygmomanometer measurements have some deviations from arm sphygmomanometers due to the fact that the blood vessels in the wrist are farther away from the heart, which can lead to the possibility of low blood pressure results, thus affecting the measurement of normal blood pressure. Although the wrist sphygmomanometer has deviations from the normal sphygmomanometer, the difference in its final result is not very big. However, since wrist sphygmomanometers are prone to lower results than the actual blood pressure, they are not used in clinical practice and are mainly used when traveling or going out. Wrist sphygmomanometers will have a certain degree of error, but the error is not too large, it is recommended to keep a good mood, avoid too much tension. If the measurement result is abnormal, you should consult a doctor in time for relevant examinations.