Eyes have felt heavy; Felt tired; Light scab where the injection was; (Arm) was pink; Skin felt warm/Temperature was 100.1 degrees Fahrenheit/ fever was down to 99.1 degrees,; Red spot/papule (at injection site); (Arm) tender to touch; Arm looked fatter/(Arm) was swollen; Muscles kind of felt achy; Felt as hard as a rock on the inside at the muscle; Very slightly itchy; COVID Arm; This spontaneous case was reported by a consumer and describes the occurrence of PERIPHERAL SWELLING (Arm looked fatter/(Arm) was swollen), MYALGIA (Muscles kind of felt achy), MUSCLE TIGHTNESS (Felt as hard as a rock on the inside at the muscle), PRURITUS (Very slightly itchy) and VACCINATION SITE REACTION (COVID Arm) in a 73-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 039D21A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     No Medical History information was reported.   On 24-Oct-2021, the patient received third dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 25-Oct-2021, the patient experienced PERIPHERAL SWELLING (Arm looked fatter/(Arm) was swollen), MYALGIA (Muscles kind of felt achy), MUSCLE TIGHTNESS (Felt as hard as a rock on the inside at the muscle), PRURITUS (Very slightly itchy), VACCINATION SITE REACTION (COVID Arm), VACCINATION SITE RASH (Red spot/papule (at injection site)), VACCINATION SITE PAIN ((Arm) tender to touch), VACCINATION SITE ERYTHEMA ((Arm) was pink) and PYREXIA (Skin felt warm/Temperature was 100.1 degrees Fahrenheit/ fever was down to 99.1 degrees,). On 28-Oct-2021, the patient experienced VACCINATION SITE SCAB (Light scab where the injection was). On an unknown date, the patient experienced ASTHENOPIA (Eyes have felt heavy) and FATIGUE (Felt tired). The patient was treated with PARACETAMOL (TYLENOL) on 25-Oct-2021 for Fever, at an unspecified dose and frequency. At the time of the report, PERIPHERAL SWELLING (Arm looked fatter/(Arm) was swollen), MYALGIA (Muscles kind of felt achy), MUSCLE TIGHTNESS (Felt as hard as a rock on the inside at the muscle), PRURITUS (Very slightly itchy), VACCINATION SITE REACTION (COVID Arm), VACCINATION SITE SCAB (Light scab where the injection was), ASTHENOPIA (Eyes have felt heavy), VACCINATION SITE RASH (Red spot/papule (at injection site)), VACCINATION SITE PAIN ((Arm) tender to touch) and FATIGUE (Felt tired) outcome was unknown and VACCINATION SITE ERYTHEMA ((Arm) was pink) and PYREXIA (Skin felt warm/Temperature was 100.1 degrees Fahrenheit/ fever was down to 99.1 degrees,) was resolving.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On 25-Oct-2021, Body temperature: 100.1 (High) 100.1 degree Fahrenheit. On 28-Oct-2021, Body temperature: 99.1 (High) 99.1 degree.   No relevant concomitant medications was reported.  Other treatment includes using frozen vegetables (as a cool compress).  It was reported that on 27-OCT-2021 arm was improving, less pink, on 28-OCT-2021 fever was down to 99.1 degrees but she was normally around 97.7 degrees Fahrenheit.  It just seems like there is a streak under the muscle and felt almost like a light scab.    This case was linked to MOD-2021-368037 (Patient Link).