Diet can sometimes help too. I believe my osteoarthritis is helped by my diet.
I've also heard that hand arthritis is generally rheumatory arthritis. My rheumatologist has this. Her hands look knotted and painful.
Here's just one link about diet and arthritis:
Fibromyalgia, CFS, MCS, scoleosis, herniated disks, spinal stenosis, osteoarthritis, sjorgens, sleep apnea, asthma, allergies, headaches. On a regiment of different supplements including sleep supplements. I eat nutritiously and do not eat foods I'm sensitive to and ever since a back injury triggered my fibromyalgia, I have been doing prescribed stretches twice daily.