Lay off the sugar and carbs in all its forms. Yes you can still eat them, just don't binge on them or rely on them.
Sugar does the same to the body as pouring it into the gas tank of a piston engine .... it destroys the internal systems and stops the vehicle from running.
For most people in their forties who suffer from those kind of ailments it’s usually caused by unhealthy lifestyle. Stop drinking alcohol and exercise more. Alcohol causes inflammation in your body. You’re not in your twenties anymore, your body can’t take that kind of beating anymore that alcohol causes.
Glucosamine, curcumin with pepper, heat, regular exercise, dietary changes to reduce inflammation, top up with ibuprofen or paracetamol but be careful about doing that too much or in too large quantities. Especially ibuprofen.
On a related note, one of osteoarthritis's most common comorbities is depression. That may be down to inflammation. That's why some people report that ibuprofen can reduce their symptoms, although you obviously shouldn't use ibuprofen regularly. If applicable, perhaps you've noticed you get particularly sad when your OA flares up, this is something to maybe talk about with your doctor.
Also notify your doctor if you're taking supplements. Some interact with medication and dosage is key.
I was really shocked how helpful curcumin is for chronic inflammation. I was having trouble with reoccurring tendonitis in my shoulders and thought I was going to have to give up lifting. Doctor didn't have anything else to offer. Read a study about this proving useful and I thought "Simple enough to try it and find out."