patient received first dose on 12Apr2021 and scheduled for second dose on 24May2021/Patient plans to get the second dose on 24May2021; arm is still "sensitive/some sensitivity in arm; "arm went down but it took a few days, it was very slow"; developed "Moderna Arm"; "there was a big red patch on my left arm"; the site of injection  was hot/very hot; the site of injection  was itchy/"itching terribly; the site of injection was swelling/"very swollen"; the site of injection  was red/very red; This spontaneous case was reported by a consumer and describes the occurrence of SENSITIVE SKIN (arm is still "sensitive/some sensitivity in arm), VACCINATION SITE WARMTH (the site of injection  was hot/very hot), VACCINATION SITE PRURITUS (the site of injection  was itchy/"itching terribly), VACCINATION SITE SWELLING (the site of injection was swelling/"very swollen") and VACCINATION SITE ERYTHEMA (the site of injection  was red/very red) in a 61-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 021B21A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     Concurrent medical conditions included Diabetes. Concomitant products included INSULIN DETEMIR (LEVEMIR), ATORVASTATIN, LOSARTAN and OXYBUTYNIN.    On 10-Apr-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 18-Apr-2021, the patient experienced VACCINATION SITE WARMTH (the site of injection  was hot/very hot), VACCINATION SITE PRURITUS (the site of injection  was itchy/"itching terribly), VACCINATION SITE SWELLING (the site of injection was swelling/"very swollen") and VACCINATION SITE ERYTHEMA (the site of injection  was red/very red). On 20-Apr-2021, the patient experienced VACCINATION COMPLICATION (developed "Moderna Arm"), ERYTHEMA ("there was a big red patch on my left arm") and MUSCULAR WEAKNESS ("arm went down but it took a few days, it was very slow"). On 11-May-2021, the patient experienced SENSITIVE SKIN (arm is still "sensitive/some sensitivity in arm). On an unknown date, the patient experienced INAPPROPRIATE SCHEDULE OF PRODUCT ADMINISTRATION (patient received first dose on 12Apr2021 and scheduled for second dose on 24May2021/Patient plans to get the second dose on 24May2021). On 14-May-2021, VACCINATION COMPLICATION (developed "Moderna Arm") outcome was unknown. At the time of the report, SENSITIVE SKIN (arm is still "sensitive/some sensitivity in arm), VACCINATION SITE WARMTH (the site of injection  was hot/very hot), VACCINATION SITE PRURITUS (the site of injection  was itchy/"itching terribly), VACCINATION SITE SWELLING (the site of injection was swelling/"very swollen") and VACCINATION SITE ERYTHEMA (the site of injection  was red/very red) outcome was unknown.        The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) was unknown.   For mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular), the reporter did not provide any causality assessments.   No concomitant medication was reported. The patient was scared because having a diabetes. Patient took Benadryl, Tylenol and  drank a lot of water.   Most recent FOLLOW-UP information incorporated above includes: On 21-May-2021: Follow up attached; Events are added