thought it was the RA acting up in my shoulder; Shoulder pain/pain is on the top of my shoulder/comes down the whole Arm/Even the elbow hurt; comes down the whole right arm/ It goes to the back of my shoulder, neck, and spinal cord/all that area hurts/This really hurts when I sleep/My whole right side is affected on my arm down to my wrist; In the arm where she was shot, that's where the pain hurts really bad/ If I move my arm too quickly, the pain comes in the area where the shot was given; My whole right side is affected on my arm down to my wrist; Frozen shoulder; Problems in my shoulder/Problems in my neck; This spontaneous case was reported by a consumer and describes the occurrence of PERIARTHRITIS (Frozen shoulder), MUSCULOSKELETAL DISCOMFORT (Problems in my shoulder/Problems in my neck), RHEUMATOID ARTHRITIS (thought it was the RA acting up in my shoulder), PAIN IN EXTREMITY (My whole right side is affected on my arm down to my wrist) and ARTHRALGIA (Shoulder pain/pain is on the top of my shoulder/comes down the whole Arm/Even the elbow hurt) in a 70-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 032M20A and 011M20A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     Concurrent medical conditions included Rheumatoid arthritis.   On 05-Feb-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 12-Mar-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. In July 2021, the patient experienced PERIARTHRITIS (Frozen shoulder), MUSCULOSKELETAL DISCOMFORT (Problems in my shoulder/Problems in my neck), PAIN IN EXTREMITY (My whole right side is affected on my arm down to my wrist), MYALGIA (comes down the whole right arm/ It goes to the back of my shoulder, neck, and spinal cord/all that area hurts/This really hurts when I sleep/My whole right side is affected on my arm down to my wrist) and VACCINATION SITE PAIN (In the arm where she was shot, that's where the pain hurts really bad/ If I move my arm too quickly, the pain comes in the area where the shot was given). On 16-Jul-2021,  after starting mRNA-1273 (Moderna COVID-19 Vaccine), the patient experienced RHEUMATOID ARTHRITIS (thought it was the RA acting up in my shoulder) and ARTHRALGIA (Shoulder pain/pain is on the top of my shoulder/comes down the whole Arm/Even the elbow hurt). The patient was treated with METHYLPREDNISOLONE for Rheumatoid arthritis, at a dose of 1 dosage form and LIDOCAINE ongoing from 06-Oct-2021 for Pain, at a dose of 1 dosage form. At the time of the report, PERIARTHRITIS (Frozen shoulder) and PAIN IN EXTREMITY (My whole right side is affected on my arm down to my wrist) outcome was unknown and MUSCULOSKELETAL DISCOMFORT (Problems in my shoulder/Problems in my neck), RHEUMATOID ARTHRITIS (thought it was the RA acting up in my shoulder), ARTHRALGIA (Shoulder pain/pain is on the top of my shoulder/comes down the whole Arm/Even the elbow hurt), MYALGIA (comes down the whole right arm/ It goes to the back of my shoulder, neck, and spinal cord/all that area hurts/This really hurts when I sleep/My whole right side is affected on my arm down to my wrist) and VACCINATION SITE PAIN (In the arm where she was shot, that's where the pain hurts really bad/ If I move my arm too quickly, the pain comes in the area where the shot was given) had not resolved.            No Concomitant product use was reported.  The patient had both doses and was due for their Moderna booster. But back in July, the patient started having problems in their shoulders and neck and the patient looked it up, and it said something about frozen shoulder. It was reported that the patient was in pain since July and was still in pain. The patient stated that the first dose was given down lower, not as high up but the second dose seemed a little higher to them. The patient confirmed that on 16-Jul-2021 night, the shoulder pain began coming on and the patient thought it was the rheumatoid arthritis acting up in their shoulder as the patient had history of rheumatoid arthritis. The primary care physician of the patient put them on some steroid pills for about 10 days and the steroid worked until they stopped taking it and the pain came back. The pain was on the top of their shoulder and comes down the whole right arm and even the elbow hurt.  Reportedly, the patient also stated that the pain hurts really bad in the arm where the patient received the shot and it goes to the back of their shoulder, neck, and spinal cord and all that area hurts. Around Wednesday 06-Oct-2021, the patient started putting 2-3 Lidocaine 5% patches on for 12 hours in those areas and noticed that when the patch comes off, the pain comes back. The patient stated that this really hurts when they sleep, and it really bothered the patient when they lie down. If the patient moves their arm too quickly, the pain comes in the area where the shot was given. Reportedly, the patient's whole right side was affected on their arm down to their wrist.   Most recent FOLLOW-UP information incorporated above includes: On 11-Oct-2021: Significant follow up was received which contains the reporter information, suspect dose batch no, anatomical location, drug onset dates, new events, treatment medications and description of the event. All these information were incorporated in the report.; Sender's Comments: This case concerns a 70-year-old, female patient, with medical history of rheumatoid arthritis, who experienced the non-serious, unexpected, AESI event of rheumatoid arthritis and other non-serious events. The events occurred  4 months after second dose of Moderna vaccine. The rechallenge is unknown as no details were given regarding first dose. The patient's age, rheumatoid arthritis and prolonged onset latency  of 4 months remain as confounders to the events. The benefit-risk relationship of Moderna vaccine is not affected by this report.