For intense pressure:
* Pressure like a vice grip: This emphasizes the feeling of being squeezed or trapped.
* Pressure like a weight on your chest: This conveys a sense of heaviness and difficulty breathing.
* Pressure like a volcano about to erupt: This compares pressure to something that is about to explode.
For persistent pressure:
* Pressure like a constant drip, drip, dripping: This emphasizes the unrelenting nature of the pressure.
* Pressure like a nagging voice in your head: This compares pressure to an internal voice that won't stop.
For mounting pressure:
* Pressure like a snowball rolling downhill, gathering momentum: This describes pressure that is increasing and becoming more difficult to manage.
* Pressure like a balloon slowly filling up with air: This suggests that pressure is building gradually and may soon reach a breaking point.
For pressure that is hard to ignore:
* Pressure like a persistent mosquito buzzing in your ear: This emphasizes the irritating and inescapable nature of the pressure.
* Pressure like a bright light shining in your eyes: This compares pressure to something that is impossible to miss.
The best simile to use will depend on the specific context and the type of pressure you want to describe.