Joint pain; discoloration on her right arm where the vaccination was done / It's dark, reddish and goes to purple. Sometimes it has spots that are close to black/ times shade is yellowish color; discomfort; blood reaction to inflammation; reddish / started as a soft reddish pink/there's a border around it, quite dark and purpleish; allergic reaction to vaccination; This spontaneous case was reported by a consumer and describes the occurrence of VACCINATION SITE DISCOLOURATION (discoloration on her right arm where the vaccination was done / It's dark, reddish and goes to purple. Sometimes it has spots that are close to black/ times shade is yellowish color), DISCOMFORT (discomfort), INFLAMMATION (blood reaction to inflammation), VACCINATION SITE ERYTHEMA (reddish / started as a soft reddish pink/there's a border around it, quite dark and purpleish) and HYPERSENSITIVITY (allergic reaction to vaccination) in an 81-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 066K21A, 049E21A, 011M20A and 042L20A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     Patient allergy history was none and was never diagnosed or tested positive for COVID -19.  The patient's past medical history included Bruise (She had bruises before). Concurrent medical conditions included Parkinson's disease.   On 25-Jan-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 23-Feb-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 24-Sep-2021, received third dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 04-Apr-2022, received fourth dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. In April 2022, the patient experienced VACCINATION SITE DISCOLOURATION (discoloration on her right arm where the vaccination was done / It's dark, reddish and goes to purple. Sometimes it has spots that are close to black/ times shade is yellowish color), DISCOMFORT (discomfort), INFLAMMATION (blood reaction to inflammation), VACCINATION SITE ERYTHEMA (reddish / started as a soft reddish pink/there's a border around it, quite dark and purpleish) and HYPERSENSITIVITY (allergic reaction to vaccination). On an unknown date, the patient experienced ARTHRALGIA (Joint pain). At the time of the report, VACCINATION SITE DISCOLOURATION (discoloration on her right arm where the vaccination was done / It's dark, reddish and goes to purple. Sometimes it has spots that are close to black/ times shade is yellowish color), INFLAMMATION (blood reaction to inflammation), VACCINATION SITE ERYTHEMA (reddish / started as a soft reddish pink/there's a border around it, quite dark and purpleish) and ARTHRALGIA (Joint pain) had not resolved and DISCOMFORT (discomfort) and HYPERSENSITIVITY (allergic reaction to vaccination) outcome was unknown.        For mRNA-1273 (Moderna COVID-19 Vaccine) (Unknown), the reporter did not provide any causality assessments.   No other vaccines given within 1 month prior to Moderna COVID-19 vaccine. No concomitant drugs reported. Patient situation is unusual because it's been six weeks. Reporter read on the internet that it lasts a month, but hers is well over a month and Hers is up on the shoulder all the way down almost to the junction in her arm, about a foot or more long.  Patient had joint pain and used topical stuff for that, but after stopping that medication, there was no change. The patient states there is nothing topical they know to put on the discoloration. At the moment on the call, the reporter states that his wife's arm is lighter than it was yesterday 10May2022. The bottom is darker than at the top of her arm, like the blood is draining. The reporter reports none. The patient tried Rain Soap, but there was no difference after using it.   Most recent FOLLOW-UP information incorporated above includes: On 11-May-2022: Live non-significant follow-up appended.