2. What are normal blood pressure readings?

Optimal blood pressure is less than 120/80 mm Hg, where systolic blood pressure is 120 mm Hg and diastolic blood pressure is less than 80 mm Hg.

3. Is there a difference between left-arm and right-arm blood pressure?

Yes, it is common to notice differences between left-arm and right-arm pressure. Studies have been conducted to claim that a difference of 10 mm Hg or less can be considered to be normal variation of blood pressure between the two arms and should not raise concern. Consult your health care provider if the difference is higher than 10 mm of Hg.