itching; felt groggy the next day; she had pain in her arm that went into her armpit and traveled down into her back; she had pain in her arm that went into her armpit and traveled down into her back; she had pain in her arm that went into her armpit and traveled down into her back; felt tired the next day; big red patch that looked like measles; experienced COVID arm 8 days after the vaccine; Underarm pain; Neck pain; This spontaneous case was reported by a consumer and describes the occurrence of RASH MORBILLIFORM (big red patch that looked like measles), AXILLARY PAIN (Underarm pain), NECK PAIN (Neck pain), PRURITUS (itching) and SOMNOLENCE (felt groggy the next day) in a 72-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 011A21A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     Concurrent medical conditions included Hypertension, Hypothyroidism, Pollen allergy and Grass allergy.   On 02-Mar-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 30-Mar-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 2 dosage form. On 30-Mar-2021, the patient experienced AXILLARY PAIN (Underarm pain) and NECK PAIN (Neck pain). On 07-Apr-2021, the patient experienced VACCINATION SITE RASH (experienced COVID arm 8 days after the vaccine). On an unknown date, the patient experienced RASH MORBILLIFORM (big red patch that looked like measles), PRURITUS (itching), SOMNOLENCE (felt groggy the next day), PAIN IN EXTREMITY (she had pain in her arm that went into her armpit and traveled down into her back), AXILLARY PAIN (she had pain in her arm that went into her armpit and traveled down into her back), BACK PAIN (she had pain in her arm that went into her armpit and traveled down into her back) and FATIGUE (felt tired the next day). The patient was treated with HYDROCORTISONE at a dose of UNK dosage form. On 06-Apr-2021, AXILLARY PAIN (Underarm pain) and NECK PAIN (Neck pain) had resolved. At the time of the report, RASH MORBILLIFORM (big red patch that looked like measles), PRURITUS (itching), SOMNOLENCE (felt groggy the next day), PAIN IN EXTREMITY (she had pain in her arm that went into her armpit and traveled down into her back), AXILLARY PAIN (she had pain in her arm that went into her armpit and traveled down into her back), BACK PAIN (she had pain in her arm that went into her armpit and traveled down into her back), FATIGUE (felt tired the next day) and VACCINATION SITE RASH (experienced COVID arm 8 days after the vaccine) had resolved.        The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Unknown) and mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) was unknown.       Concomitant product use was not provided by the reporter.  Based on the current available information and temporal association between the use of the product and the start date of the events, a causal relationship cannot be excluded. Further information has been requested.   This case was linked to MOD-2021-039274, MOD-2021-039274 (Patient Link).   Most recent FOLLOW-UP information incorporated above includes: On 07-Jun-2021: additional AE and treatment were added.; Sender's Comments: Based on the current available information and temporal association between the use of the product and the start date of the events, a causal relationship cannot be excluded. Further information has been requested.