here is what helped reduce my chronic neck pain: red meat (beef) with no side dish, eating healthy in general (and I mean truly healthy, not "oh one small candy bar every two days is proably okay..." no, it actually isn't. It's poison.) and exercise, a foam roller, bench press. Also definitely don't eat leafy greens, if you do that then you should stop in my opinion. I can't emphasize enough how important it is to truly eat perfectly. You can't make a single mistake or it will start the sickness cycle again. Not immediately but even a single piece of chocolate will make it so that the body is susceptible to further damage the next day. Then if I eat another piece the second day I'm really risking it and the damage left a hole in my health. I've had multiple instances where I ate a piece of cake and a donut and I was getting sickly with a hot head within 2h. I think it's hard to emphasize enough how important health is, it should be your top hobby to be healthy and eat healthy. It should be your nr.1 pasttime to research health and draw joy from doing health related things.