Under arm it's purple the bruising is incredible/ bruising under the arm, armpit area, near the breast area. Also (bruising) down arm towards elbow; Acute immune response; I thought I must be crazy.; Pain under my arm was severe, throbbing/ Throbbing in the night was terrible.; Arm was tender; experienced soreness under my arm/ pain under arm (is) pretty intense; Worked and was fatigued; Had a 101 degree Fever; This spontaneous case was reported by a patient and describes the occurrence of TENDERNESS (Arm was tender), PAIN (Pain under my arm was severe, throbbing/ Throbbing in the night was terrible.), CONTUSION (Under arm it's purple the bruising is incredible/ bruising under the arm, armpit area, near the breast area. Also (bruising) down arm towards elbow), VACCINATION COMPLICATION (Acute immune response) and FEELING ABNORMAL (I thought I must be crazy.) in a 57-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 001M21A, 044A21A, 009C21A and 071F21A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     It was reported that there was no history of COVID  and no history of allergies.    On 29-Mar-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 26-Apr-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 04-Nov-2021, received third dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 13-Apr-2022, received fourth dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 13-Apr-2022,  after starting mRNA-1273 (Moderna COVID-19 Vaccine), the patient experienced PAIN (Pain under my arm was severe, throbbing/ Throbbing in the night was terrible.). In April 2022, the patient experienced TENDERNESS (Arm was tender), PAIN IN EXTREMITY (experienced soreness under my arm/ pain under arm (is) pretty intense), FATIGUE (Worked and was fatigued) and PYREXIA (Had a 101 degree Fever). On an unknown date, the patient experienced CONTUSION (Under arm it's purple the bruising is incredible/ bruising under the arm, armpit area, near the breast area. Also (bruising) down arm towards elbow), VACCINATION COMPLICATION (Acute immune response) and FEELING ABNORMAL (I thought I must be crazy.). The patient was treated with PARACETAMOL (TYLENOL [PARACETAMOL]) for Adverse event, at an unspecified dose and frequency. At the time of the report, TENDERNESS (Arm was tender), PAIN (Pain under my arm was severe, throbbing/ Throbbing in the night was terrible.), CONTUSION (Under arm it's purple the bruising is incredible/ bruising under the arm, armpit area, near the breast area. Also (bruising) down arm towards elbow), VACCINATION COMPLICATION (Acute immune response), FEELING ABNORMAL (I thought I must be crazy.), PAIN IN EXTREMITY (experienced soreness under my arm/ pain under arm (is) pretty intense), FATIGUE (Worked and was fatigued) and PYREXIA (Had a 101 degree Fever) outcome was unknown.            No concomitant medications was reported.    This case was linked to MOD-2022-542006 (Patient Link).   Most recent FOLLOW-UP information incorporated above includes: On 15-Apr-2022: Follow-up received includes no new information.