couldn't move her arm/tender to the touch; was very warm to the skin; itchy scratchy feeling to it; redness; couldn't move her arm/tender to the touch; arm  from the elbowto under the armpit was all the swelling/arm swollen; arm  from the elbowto under the armpit was all the pain/excruciating pain; rash; This spontaneous case was reported by a physician and describes the occurrence of MOBILITY DECREASED (couldn't move her arm/tender to the touch), SKIN WARM (was very warm to the skin), PRURITUS (itchy scratchy feeling to it), ERYTHEMA (redness) and PAIN IN EXTREMITY (couldn't move her arm/tender to the touch) in a female patient of an unknown age who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 6525, 034121A, 046A21A and 001821A) for COVID-19 prophylaxis. The occurrence of additional non-serious events is detailed below.     No Medical History information was reported.   On 02-Mar-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 30-Mar-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 12-Nov-2021, received third dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 30-Sep-2022, received fourth dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On an unknown date, the patient experienced MOBILITY DECREASED (couldn't move her arm/tender to the touch), SKIN WARM (was very warm to the skin), PRURITUS (itchy scratchy feeling to it), ERYTHEMA (redness), PAIN IN EXTREMITY (couldn't move her arm/tender to the touch), INJECTION SITE SWELLING (arm  from the elbowto under the armpit was all the swelling/arm swollen), INJECTION SITE PAIN (arm  from the elbowto under the armpit was all the pain/excruciating pain) and RASH (rash). The patient was treated with IBUPROFEN for Pain, at an unspecified dose and frequency. At the time of the report, MOBILITY DECREASED (couldn't move her arm/tender to the touch), SKIN WARM (was very warm to the skin), PRURITUS (itchy scratchy feeling to it) and PAIN IN EXTREMITY (couldn't move her arm/tender to the touch) was resolving and ERYTHEMA (redness), INJECTION SITE SWELLING (arm  from the elbowto under the armpit was all the swelling/arm swollen), INJECTION SITE PAIN (arm  from the elbowto under the armpit was all the pain/excruciating pain) and RASH (rash) had resolved.        For mRNA-1273 (Moderna COVID-19 Vaccine) (Unknown), the reporter did not provide any causality assessments.   Patients arm was swollen, it was unbelievable and she could not move it, it was tender to the touch. She was glad she had a few shirts that would button in the front, otherwise she would have been in trouble since she could not lift her arm to pull the shirt over her head. She had pain if she touched it, and it was very warm to the skin, it had also itchy scratchy feeling to it, but she refused to scratch it.  She put IcyHot on it and took some Ibuprofen. She clarified that she used an IcyHot patch, which they told her she could only use it three times a day and not to exceed 8 hours of using it. She used a patch as opposed to a roll on, because it was enough just to lay a patch on there. She doesn't think the Ibuprofen helped. It was exactly one week later from taking it, the shot, that the swelling has subsided and the redness and rash is gone. She can lift her arm, not partially, but good all over again, and she started being able to move it on. She doesn't have pain, swelling, and the rash is all gone as well. She doesn't think the Ibuprofen helped. she still was in pain and had to sleep on her left side, and she was a right side sleeper.  No relevant concomitant medications were reported.