6 weeks later arm swelling was noticed; Whole left arm was 1 inch thicker than right arm and hand; Lymphedema; Edema on area lower elbow,edema on fingers of left arm; Rash erythematous; Swollen forearm; Itchiness on left arm area; Periodically disappearing rash on left arm; This spontaneous case was reported by a physician and describes the occurrence of OEDEMA PERIPHERAL (Edema on area lower elbow,edema on fingers of left arm), PERIPHERAL SWELLING (Swollen forearm), PRURITUS (Itchiness on left arm area), RASH ERYTHEMATOUS (Rash erythematous) and PERIPHERAL SWELLING (6 weeks later arm swelling was noticed) in an 89-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 006M20A and 012L20A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     The patient's past medical history included Pacemaker insertion (cardiac). Concomitant products included FAMOTIDINE, CANDESARTAN, ROSUVASTATIN, AMLODIPINE, METOPROLOL, ALLOPURINOL, VITAMIN B12 NOS, VITAMIN B3, ASPIRIN [ACETYLSALICYLIC ACID] and VITAMIN A NOS for an unknown indication.   On 15-Jan-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 11-Feb-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 06-Apr-2021, the patient experienced PERIPHERAL SWELLING (Swollen forearm) and PRURITUS (Itchiness on left arm area). 06-Apr-2021, the patient experienced RASH (Periodically disappearing rash on left arm). On 07-Apr-2021, the patient experienced OEDEMA PERIPHERAL (Edema on area lower elbow,edema on fingers of left arm). 07-Apr-2021, the patient experienced RASH ERYTHEMATOUS (Rash erythematous). On an unknown date, the patient experienced PERIPHERAL SWELLING (6 weeks later arm swelling was noticed), SWELLING (Whole left arm was 1 inch thicker than right arm and hand) and LYMPHOEDEMA (Lymphedema). At the time of the report, OEDEMA PERIPHERAL (Edema on area lower elbow,edema on fingers of left arm), PERIPHERAL SWELLING (Swollen forearm), PRURITUS (Itchiness on left arm area), RASH ERYTHEMATOUS (Rash erythematous), PERIPHERAL SWELLING (6 weeks later arm swelling was noticed), SWELLING (Whole left arm was 1 inch thicker than right arm and hand), LYMPHOEDEMA (Lymphedema) and RASH (Periodically disappearing rash on left arm) had not resolved.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On an unknown date, Computerised tomogram: negative (Negative) Negative. On an unknown date, Pain threshold decreased: decreased (Low) Decreased(Swelling is not painful). On an unknown date, Ultrasound Doppler: negative (Negative) Negative. On an unknown date, X-ray: negative (Negative) Negative.     For mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular), the reporter did not provide any causality assessments.   No treatment medications were reported.   This case was linked to MOD-2021-101190 (Patient Link).   Most recent FOLLOW-UP information incorporated above includes: On 22-Apr-2021: Follow up received contains significant information: Patient's immunization record updated On 29-Apr-2021: Follow up received contains significant information. The photographs of patient and lot numbers of both vaccines were added to case. On 04-Jun-2021: Follow up received contains significant information. The primary reporter details were added.The medical history updated, new events were added and information added to I narrative On 30-Jul-2021: Follow-up received contains no new information.