Omron Hem-7120 BP Monitor

Any automated blood pressure monitors have a error range of 5-10 mm of Hg. But you can trust them. So go for it.

Your BP is normal, the exact numbers are usually more in hospital due to anxiety. Your machine is ok too.

This is very significant difference between two arms if bp was taken properly. You need to consult cardiologist immediately and may require physical examination and 2decho.

Hello please visit cardiologist nearby. And also do bp monitoring -check your bp daily for 7 days at different timings. Your cardilogist may ask you to do some tests as you are young to have high bp. To rule out causes for high bp. If hypertension is confirmed he may start you with bp lowering medicines. Reduce your salt intake to minimum. You have not mentioned the weight here but reducing weight and starting exercize like walking may help you to lower your bp. Thanks and regards. Wish you good health.

It's better you go for mercury based sphygmomanometer. They are accurate. Consult online to know how to use. It’s very easy.