allergic reaction; blisters; persisting symptoms of itching, pinkness, swelling on my 'sac'; swelling on neck, slashes behind ears, on behind, shoulder blades, above and below elbows,; Itching; rashes all over body, comes and goes; excessive rash/Rash has gotten bigger in the body and arms and now its on neck.; same rash above elbow/came back on a different side of his arm./another rash spot on both ears.; rash all over body; This spontaneous case was reported by a consumer and describes the occurrence of HYPERSENSITIVITY (allergic reaction), BLISTER (blisters), ERYTHEMA (persisting symptoms of itching, pinkness, swelling on my 'sac'), SWELLING (swelling on neck, slashes behind ears, on behind, shoulder blades, above and below elbows,) and PRURITUS (Itching) in a 75-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 044AZ1A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     No medical history provided by reporter.  Concomitant products included TAMSULOSIN from 10-Feb-2021 to an unknown date and SUCRALFATE from 11-Apr-2020 to an unknown date for an unknown indication.   On 17-Feb-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 17-Mar-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) dosage was changed to 1 dosage form. On 24-Feb-2021, the patient experienced HYPERSENSITIVITY (allergic reaction), BLISTER (blisters), ERYTHEMA (persisting symptoms of itching, pinkness, swelling on my 'sac'), SWELLING (swelling on neck, slashes behind ears, on behind, shoulder blades, above and below elbows,), RASH (rashes all over body, comes and goes), RASH (excessive rash/Rash has gotten bigger in the body and arms and now its on neck.) and RASH (same rash above elbow/came back on a different side of his arm./another rash spot on both ears.). 24-Feb-2021, the patient experienced PRURITUS (Itching) and RASH (rash all over body). The patient was treated with TRIAMCINOLONE ACETONIDE ongoing from 25-Feb-2021 for Itching, at a dose of UNK UNK, as necessary; DIPHENHYDRAMINE HYDROCHLORIDE (BENADRYL [DIPHENHYDRAMINE HYDROCHLORIDE]) ongoing from 23-May-2021 for Itching, at a dose of 25 milligram as necessary; METHYLPREDNISOLONE from 09-Apr-2021 to 16-Apr-2021 for Allergy, at a dose of 4 milligram for 6 days; LORATADINE ongoing from 06-May-2021 for Hives, at a dose of 10 milligram twice a day; HYDROXYZINE ongoing from 06-Apr-2021 for Allergy, at a dose of UNK, bid and HYDROCORTISONE ongoing since an unknown date at an unspecified dose and frequency. At the time of the report, HYPERSENSITIVITY (allergic reaction), BLISTER (blisters), ERYTHEMA (persisting symptoms of itching, pinkness, swelling on my 'sac'), SWELLING (swelling on neck, slashes behind ears, on behind, shoulder blades, above and below elbows,), PRURITUS (Itching), RASH (rashes all over body, comes and goes), RASH (excessive rash/Rash has gotten bigger in the body and arms and now its on neck.), RASH (same rash above elbow/came back on a different side of his arm./another rash spot on both ears.) and RASH (rash all over body) had not resolved.            Most recent FOLLOW-UP information incorporated above includes: On 24-May-2021: initial additional document received on 24-05-2021 contain Concomitant, treatment medications added, Updated events.