Hopefully Greg or someone with experience with physical side effects from pressure responds.
I played for about 20 years with pressure and clamping, including marching band stuff (USA) but never felt any big physical side effects, so I may not I know.
But, some of the greatest players (Wayne Bergeron, Thomas Gansch) have mentioned cut lips, blood in the mouthpiece and even have physical signs of scarring and have an amazing sound and seemingly effortless ability.
I think our bodies are extremely resilient.
My .02, FWIW, good luck!