MRI shows: Severe left facet arthropathy, with extensive associated bone marrow edema. C4-C5. Is there any treatment to help alleviate this pain?

Varies. The MRI findings you describe can potentially cause neck pain, headaches, and pain that runs into the arm. Treatment options run from very conservative to more aggressive based upon the severity of the pain and results of an exam, but can include: medications, traction, physical therapy, epidural steroid injections, radio frequency ablation, and even surgical considerations. .
Need a diagnosis. While the MRI may be important, you need a DIAGNOSIS before you can figure out the best treatment for this condition. What caused the "facet arthropathy"? What type of arthropathy is it? Do you have a family history of rheumatoid arthritis? See a Rheumatologist, bring the MRI pictures & report, & go over your symptoms. Only then can we confidently prescribe treatment. Alternative: HealthTap Prime.
See a neurosurgeon. Facet arthropathy with bone marrow edema is a possible finding with a lot of severe inflammation of the facet joints of the spine. Evaluation by a neurosurgeon or other spine specialist is recommended. Treatment options will vary depending on the individual situation, but can include oral medications, injections in the area, or ablation of the sensory nerves.