How do you mentally cope with your physical pain?

Mind over matter... I don't mind so it don't matter.

That is rather glib, but it DOES work to an extent. We notice what we pay attention to. The more you focus on your pain, the more the pain will draw your focus.

A few months back I was shot in the shoulder at point blank range. It hurt like the Dickens, but I felt the impact (which broke my collarbone) not the rending flesh. I seriously didn't even know it was an actual bullet (I thought it must have been a bean bag round or something like that because of the impact) until my hand came away bloody. The pain almost immediately subsided as I realized I needed to get to a nearby house and have them call 911. And it stayed away while I worked through ensuring the scene was safe, self aid, police report, and notifying my employer. Once I had taken care of my responsibilities and I heard the ambulance coming so I could "surrender" to the injury, the pain got a lot worse real quick.

Once I was in the hospital, the pain was never all that bad as long as I was occupying myself with other things. When I thought about the pain it got worse.

Obviously, we should rarely just ignore pain, and even when we do, we can't ignore it for ever. But finding other things to focus on goes a great way to mentally dealing with the physical pain.

For me, staying busy helps – music, short walks, and sometimes certain cannabis strains like Guava Dawg help ease the pain a bit. If you're curious, you can check it out here:
https://strains.uk/weed-strains/guava-dawg-strain

I find the hardest physical things I can do without making my pain or injury worse…and I do the hell out of them. I try to enjoy what my body can still do.

For over the past two years been dealing with body wide neuropathy. Most nights I couldn't get to sleep because of the pain. Just finished Biofeedback at Kaiser, I am able to sleep almost every night now.

After Over 20 Years Of Not Having Full Use Of My Left Arm And Constant Back And Leg Pain,
I Have Found A Few Things That Take My Mind Off The Pain.
Staying Busy Doing Things You Enjoy Helps A lot
I Like Fishing And Hunting , So I Find Outfitters Who Can Accommodate My Disabilities.
I Also Volunteer At Local Food Banks And My Church Has A Soup Kitchen Where I Cook Meals For The Less Fortunate.
And The Most Important Things I Do Is Spend As Much Time With My Wife And Daughter As I Can Even Just Sitting On The Couch Watching Movies And Eating Popcorn, Try To Make Your Life As Normal As Possible.

A number of decades ago, I was hit by a car and in a back brace for 2 years. Twice daily exercises eventually got me squared away. I still exercise on a regular basis.

I am retired because I broke my back in 2 places 19 yrs ago. I have PTSD, TBI, a lot of damage to my neck which I am going to physical therapy for, my left knee is in a brace because it is not bone on bone yet (right knee has been replaced) my right shoulder has a torn rotator cuff, a spur, fluid on it, arthritis and the part connected to the bone going to my bicep is coming apart but nothing can be done because it will make my neck worse (left shoulder has been replaced). On top of that I have fibromyalgia. For 30+ yrs I have lived with constant pain 24/7. I have found that as long as I know what is causing it (no matter if it can ever get better) it makes it easier to deal with. I just try to get the most out of each day. Helping others makes me happy and helps let me forget the pain for a while. It is just my dog and myself and she gives me a lot of joy and companionship, unconditional love can also help you forget your pain for a little while. Life is worth living, live it to the fullest as long as you find things in life that make you happy pain is just a fly buzzing in your ear that needs to be swatted.