No one wants it, yet it's the body's way of getting your attention when something is wrong. You're probably sufficiently in tune with your body to know when the pain is just a bother, perhaps the result of moving furniture a day or two before or eating that third enchilada.
Wrist Blood Pressure Monitors use the radial artery to measure blood pressure instead of the more commonly used brachial artery. The key is to place the monitor on your wrist properly, just above the wrist bone and then to hold your wrist up level with or above your heart.
If you're left-handed, pressure may be higher in the left arm, and vice versa. It shouldn't make a huge difference, but, the association adds: If one arm has higher blood pressure than the other, that arm should be used to determine if you have hypertension..