Visit physiotherapy centre

Self Massage the back of neck. https://www.youtube.com/watch?v=eA9hCrSc7iY Chiropractic adjustment will help. Take frequent Breaks at work. Core Strengthening Exercises. Use cervical pillow. Use Back Support.

please visit nearest physiotherapy clinic as yiu need proper diagnosis for treatment.

Pls answer the following questions first. A thorough history is mandatory 1. Pls mention whether you have a history of this pain in the past . 2.How did it start . 3. Has the intensity been the same throughout or it has been gradually increasing. 4. Is it specific in a movement/ position or irrespective of that. 5. You also need to specify your work profile as vaccine cannot give pain for that long. Temporary soreness may be there for couple of days after injection but not more than that

Pls visit some expert physiotherapist as this needs to be assessed and treated as there are many reasons involved for pain.

It needs to be assessed. You are in the frozen shoulder age group. But hard to diagnose with limited information. Please visit a physiotherapist