Couldn't eat for two days; Arm itching at injection site; Extremely tired; Stabbing pain under right armpit/ stabbing pains under her right arm comes and go but less and less; Right arm sore at injection site, could not touch; Arm was also swollen like an egg at injection site/ developed which progressively got worse- 3 days later; Pain in right shoulder blade; This spontaneous case was reported by a patient and describes the occurrence of PAIN (Stabbing pain under right armpit/ stabbing pains under her right arm comes and go but less and less), DECREASED APPETITE (Couldn't eat for two days), VACCINATION SITE PRURITUS (Arm itching at injection site), MYALGIA (Right arm sore at injection site, could not touch) and VACCINATION SITE SWELLING (Arm was also swollen like an egg at injection site/ developed which progressively got worse- 3 days later) in a 61-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     No Medical History information was reported.   On 22-Apr-2021, the patient received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) dosage was changed to 1 dosage form. On an unknown date, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 22-Apr-2021, the patient experienced PAIN (Stabbing pain under right armpit/ stabbing pains under her right arm comes and go but less and less), MYALGIA (Right arm sore at injection site, could not touch), VACCINATION SITE SWELLING (Arm was also swollen like an egg at injection site/ developed which progressively got worse- 3 days later) and ARTHRALGIA (Pain in right shoulder blade). On 24-Apr-2021, the patient experienced DECREASED APPETITE (Couldn't eat for two days), VACCINATION SITE PRURITUS (Arm itching at injection site) and FATIGUE (Extremely tired). On 26-Apr-2021, DECREASED APPETITE (Couldn't eat for two days) had resolved. At the time of the report, PAIN (Stabbing pain under right armpit/ stabbing pains under her right arm comes and go but less and less), MYALGIA (Right arm sore at injection site, could not touch), ARTHRALGIA (Pain in right shoulder blade) and FATIGUE (Extremely tired) outcome was unknown and VACCINATION SITE PRURITUS (Arm itching at injection site) and VACCINATION SITE SWELLING (Arm was also swollen like an egg at injection site/ developed which progressively got worse- 3 days later) had resolved.        For mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular), the reporter did not provide any causality assessments.   Treatment for the event included Ibuprofen.  No relevant concomitant medication were reported.  The patient received both scheduled doses of mRNA-1273 prior to the events; therefore, action taken with the drug in response to the events are not applicable.   This case was linked to MOD-2021-060777 (Patient Link).   Most recent FOLLOW-UP information incorporated above includes: On 12-May-2021: Non-Significant follow-up appended On 13-May-2021: Patient reported adverse events after first dose of vaccination. The outcome of the events ("Arm was also swollen like an egg at injection site" and "Injection site started itching") changed (from unknown to resolved).