Everyone is different and there might be some fixable and specific, identifiable reasons for your back pain.
However, before surgery shots or chiropractic I personally would try the following.
Dont eat sugar for at least 2 months. Like, zero unnecessary sugar. No bread, pasta, rice, or regular potatoes. Sweet potatoes are fine. Avoid a lot of sugary fruit. Eat Lots of eggs, meat, veggies. Broccoli, peppers, spinach, etc. eat eat eat all you want but avoid heavy carbs and all sugar. No processed foods only real foods. Nuts. Beans. Butter all good.
Then sometime during that, do a 3 day fast. At least three days, if you can go 12 hours over 3, even better. During this fast you cannot put any food in your mouth. Not even a raisin, it will ruin the fast. No nibbles of anything. You should drink lots and lots of water, salt water from time to time to get plenty of salt. You can do a hydration drink but check online first, it must be fast friendly and sugar free. If it isnt, like liquid iv, you may as well not even be fasting. Best to try water and plenty of salt.
Sounds terrible but honestly the first 12 hours are the worst. After that, it isnt that hard. Your hunger goes away. Look up what to eat coming out of the fast. Basically after three days of fasting your cells start to regenerate. Every hour past three days is good so go as long as you can.