After second shot all joints inflame; Arms and knees effected; Knees has become very painful to walk; The number 10 pain in shoulders has gone from a 10 to a 3; This spontaneous case was reported by a consumer and describes the occurrence of ARTHRITIS (After second shot all joints inflame), PAIN IN EXTREMITY (Arms and knees effected), GAIT DISTURBANCE (Knees has become very painful to walk) and ARTHRALGIA (The number 10 pain in shoulders has gone from a 10 to a 3) in a 73-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 053E21A and 053C21A) for COVID-19 vaccination.     Concurrent medical conditions included Hives, Hay fever, Fibromyalgia in 1985, Degenerative disc disease (The status was worse), Scoliosis (Scoliosis of spine 4 neck, the status was worse), Bell's palsy (The status was worse) and Ascites (The status was worse). Concomitant products included DEXAMETHASONE, NEOMYCIN, POLYMYXIN B (NEOPOLYDEX) from 11-Oct-2021 to an unknown date for Eye disorder, DIPHENHYDRAMINE HYDROCHLORIDE (BENADRYL [DIPHENHYDRAMINE HYDROCHLORIDE]) from 2021 to an unknown date for Multiple allergies.   On 24-Jul-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 21-Aug-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On an unknown date, the patient experienced ARTHRITIS (After second shot all joints inflame), PAIN IN EXTREMITY (Arms and knees effected), GAIT DISTURBANCE (Knees has become very painful to walk) and ARTHRALGIA (The number 10 pain in shoulders has gone from a 10 to a 3). At the time of the report, ARTHRITIS (After second shot all joints inflame), PAIN IN EXTREMITY (Arms and knees effected), GAIT DISTURBANCE (Knees has become very painful to walk) and ARTHRALGIA (The number 10 pain in shoulders has gone from a 10 to a 3) had not resolved. Not Provided          Treatment medications were not reported.  Company comment- This case concerns a 73 year old female with relevant medical history of Fibromyalgia  , Degenerative disc disease , Scoliosis, who experienced non-serious , unexpected , AESI event of Arthritis, which occurred 1 day after vaccination with the 1st dose of mRNA -1273 vaccine ( Moderna Covid 19 Vaccine ) The re-challenge for this case is not applicable since the events has not resolved yet at the time of the report. The medical condition of fibromyalgia , degenerative disc disease and scoliosis are confounders for this case. The benefit -risk relationship of mRNA-1273 vaccine (Moderna  Covid 19 vaccine ) is not affected by this report.   This case was linked to MOD-2021-278470 (Patient Link).; Sender's Comments: This case concerns a 73 year old female with relevant medical history of Fibromyalgia  , Degenerative disc disease , Scoliosis, who experienced non-serious , unexpected , AESI event of Arthritis, which occurred 1 day after vaccination with the 1st dose of mRNA -1273 vaccine ( Moderna Covid 19 Vaccine ) The re-challenge for this case is not applicable since the events has not resolved yet at the time of the report. The medical condition of fibromyalgia , degenerative disc disease and scoliosis are confounders for this case. The benefit -risk relationship of mRNA-1273 vaccine (Moderna  Covid 19 vaccine ) is not affected by this report.