Abscess; Skin discolouration; Pimple; Rheumatoid arthritis flare up; Pain; Ingrown hair on right butocks/grown to size of golf ball; High Blood Pressure; Tiredness; This spontaneous case was reported by a physician and describes the occurrence of ABSCESS (Abscess) and RHEUMATOID ARTHRITIS (Rheumatoid arthritis flare up) in a 52-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 024M20A and 012L20A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.    Co-suspect product included non-company product UPADACITINIB (RINVOQ) tablet for Rheumatoid arthritis.    The patient's past medical history included Alcoholic (BEER, MARGARITAS, Rarely) in 1988. Concurrent medical conditions included Asthma, Grass allergy, Allergy to animal (cats), Allergy to plants (Trees) and Penicillin allergy.   In November 2019, the patient started UPADACITINIB (RINVOQ) (Oral) 15 mg once a day. On 12-Jan-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 12-Feb-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) dosage was changed to 1 dosage form. In April 2021, the patient experienced HYPERTENSION (High Blood Pressure). On 20-May-2021, the patient experienced ABSCESS (Abscess) (seriousness criterion hospitalization) and INGROWN HAIR (Ingrown hair on right butocks/grown to size of golf ball). On 21-May-2021, the patient experienced PAIN (Pain). On 07-Jun-2021, the patient experienced RHEUMATOID ARTHRITIS (Rheumatoid arthritis flare up) (seriousness criterion medically significant). In 2021, the patient experienced FATIGUE (Tiredness). On an unknown date, the patient experienced SKIN DISCOLOURATION (Skin discolouration) and ACNE (Pimple). The patient was hospitalized from 24-May-2021 to 25-May-2021 due to ABSCESS. The patient was treated with VALSARTAN for Blood pressure high, at a dose of 1 dosage form; ROSUVASTATIN CALCIUM (CRESTOR) for Cholesterol, at a dose of 1 dosage form; SULFAMETHOXAZOLE, TRIMETHOPRIM (BACTRIM) at a dose of 1 dosage form; METRONIDAZOLE (FLAGYL [METRONIDAZOLE]) at a dose of 1 dosage form and Surgery for Abscess. At the time of the report, ABSCESS (Abscess), INGROWN HAIR (Ingrown hair on right butocks/grown to size of golf ball), PAIN (Pain), HYPERTENSION (High Blood Pressure), SKIN DISCOLOURATION (Skin discolouration), ACNE (Pimple) and FATIGUE (Tiredness) outcome was unknown and RHEUMATOID ARTHRITIS (Rheumatoid arthritis flare up) had not resolved.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): In October 2020, Blood cholesterol: 293 (High) High cholesterol. In April 2021, Blood pressure measurement: 176 / 106 (High) High blood pressure. In April 2021, Cardiac stress test: normal (normal) No Blockage. On 02-Jun-2021, Liver function test: ast:57 alt:147 (High) AST:57, ALT:147 Elevated liver enzymes. On 03-Jun-2021, Blood cholesterol: 128 (normal) Normal cholesterol.     For mRNA-1273 (Moderna COVID-19 Vaccine) (Unknown), the reporter did not provide any causality assessments.   Action taken with mRNA-1273 (Moderna COVID-19 Vaccine) in response to the events was not applicable.  Company Comment: Very limited information regarding the events has been provided at this time.  Further information has been requested.; Sender's Comments: Very limited information regarding the events has been provided at this time.  Further information has been requested.