Well not super hard it's just that if you press hard and you let go you can hear some suction and a plop noise I was just wondering if this pressure difference can cause any damage
I have experience with this. I've described it below in relation to my experience with earplugs (copy/pasting out of laziness), but I've had the EXACT same thing with pushing my tragus...
When you push in or take out earplugs that create a seal, you cause an increase in pressure (or suction/decrease in pressure, respectively) on the eardrum/ossicles attached to the eardrum (which make up your "middle ear"). Basically this action causes very mild barotrauma. For most people this doesn't matter, they can insert/remove sealing earplugs or headphones hundreds or thousands of times and never notice anything. But for some people, like me, and maybe you, this creates a tinnitus which doesn't resolve until the underlying mechanical (of the eardrum or ossicles/bones, or maybe even something of the inner ear, who knows!!) change heals. The tone (for me, 1220hz/1275hz/1340hz/1420hz, that sometimes alternate in a morse-code like fashion) used to last a few minutes for me, but with every subsequent pressure/suction (especially if it occurred before the previous one had fully healed), the duration increases. Currently I'm at about a month for a full heal!
If you have any questions, let me know. If you are experiencing fundamentally the same thing as I am, I'd love to help in any way I can, and I'd love to have any more information of your situation you can provide. I'm continuously trying to build my understanding of this thing/come up with testable theories of how it works/what worsens it/what improves it, so I can live with it better.
The one thing I am quite sure about is it's an objective and/or somatic tinnitus produced by the mechanic damage to... whichever. My tinnitus tones for this particular issue, unlike some other tinnitus I have, interact harmonically (not sure thats the right word) with closely matched tones — I can make it wobble or sometimes negate it entirely if I get the frequency/phase just right.