If too much blood moves to the right side of the heart, pressures in the lungs build up.

Then they would shut in the well to see if pressure built up inside.

The pressure built up in her chest as they stood there, not quite touching, but she couldn't seem to order herself to breathe.

All the time the pressure was building up in him.

A terrible pressure built up in the base of her throat.

Eventually, all the pressure built up and I had a nervous breakdown.

The pressure builds up even more because it can't be expressed.

The pressure built up so that even the Dumii could feel it.

"I figured pressure must have been building up in you somewhere," Valentine said.

The pressure will build up until it has to.