You should avoid being pressure or squeeze tightly rolled like not wearing a bra strap over shoulders, watch. Bracelet or sleeve must not be tight, not the arm blood pressure, not heavy lifting for too long.
You should avoid being rolled or clamping force, such as not wearing a bra shoulder strap, watch, bracelet or sleeve is not tight, do not measure blood pressure arm, not lifting heavy and too long.
You should avoid being pressure reed or aggressive, such as not wearing a bra strap shoulder, watches, bracelets, or coat of arms must not tight,... No blood pressure that arm, no heavy lifting, and for too long.