Your MRI appears to suggest a probable pannus at the upper cervical spine. This can sometimes be associated with inflammatory arthritis, crystal deposition, or age-related changes, and may explain the pain from your neck to the back of your head. However, the MRI findings need to be correlated with your symptoms and a clinical examination. I recommend consulting a rheumatologist or spine specialist for further evaluation. Additional blood tests or imaging may be required to identify the exact cause and decide on the most appropriate treatment. If you develop weakness in your arms or legs, difficulty walking, or loss of bladder or bowel control, please seek urgent medical attention.