Yes. You should try to figure out the cause before applying these remedies. It could be a herniated disk, or a pinched nerve, or thyroid or nerve dysfunction. That said, massage hands with rosemary, lavender or eucalyptus oil; gentle stretching; cook with turmeric and black pepper; garlic, ginger. Try taking ginkgo biloba as a supplement.
Not really. Some common sense works: do not smoke check blood pressure and lipids have a good history and exam to define status. May need ultrasound to help identify issues.