why left hand for blood pressure is 127 86 means

 A blood pressure reading of 127/86 on the left arm generally indicates that the systolic pressure (the top number) is 127 mmHg and the diastolic pressure (the bottom number) is 86 mmHg. This reading falls within the "elevated" or "high-normal" range according to most guidelines. It's a bit higher than the ideal 120/80 mmHg but not yet in the range of stage 1 hypertension. 

Here's a more detailed breakdown: 

• Systolic pressure (127 mmHg):

  This is the pressure in your arteries when your heart beats. 127 mmHg is slightly above the ideal of 120 mmHg, but still within the elevated or high-normal range.
• Diastolic pressure (86 mmHg):

  This is the pressure in your arteries when your heart rests between beats. 86 mmHg is slightly above the ideal of 80 mmHg, but still within the elevated or high-normal range.

What this means:

• While not in the stage 1 hypertension range, this reading suggests a potential risk of developing high blood pressure in the future. 
• It's recommended to monitor your blood pressure regularly and consider lifestyle modifications like diet and exercise to help manage it. 
• If you have other risk factors for heart disease, your doctor may recommend further investigation or treatment.