I literally was just telling my friends about the huge spike in my BP at drs office today. My BP is very low and today because I had to wear a mask it was 150/70. Dr refused to admit it was the mask. He said we will take it again before you leave. So after an hour with a mask on the 2nd reading was 166! I don't want to hear that these masks are harmless. I know my body and that BP reading is proof. I just ordered a BP cuff so I can prove the mask caused this increase.