The left arm blood pressure is higher than the right arm, if the difference is between 5~10mmHg, it is normal, more than 10mmHg, it is abnormal.
Human blood pressure is measured in the upper limbs, under normal circumstances, bilateral upper arm blood pressure test results may have some differences, this is due to differences in the amount of activity and vascular distribution of the arms, generally the right arm is slightly higher than the left arm blood pressure, there is also a part of the population of the left arm is slightly higher than the right arm, but the difference is generally between 5~10mmHg, this is normal, don’t worry about it.
However, if the difference between the blood pressure levels measured in the two upper arms is higher than 10mmHg, it is mostly caused by various diseases, and the common diseases that can cause this symptom are polyarteritis, congenital arteriovenous malformation, and subclavian artery blood-stealing syndrome.
When there is a big difference between the blood pressure of the two upper arms, it is recommended to consult a doctor in time, improve the vascular ultrasound and other related examinations, make a clear diagnosis, and carry out standardized treatment according to the cause of the disease.