He is still having weakness; left arm muscle still aches; thinks something is wrong with his left arm; could not lift his left arm up/could not extend his left arm; dizziness; headaches; low grade fever; left shoulder "hurt so bad"/ left arm shoulder still aches; cold chills; left arm became red at the injection site; pain in the left arm right after the injection/left arm "hurt so bad"/out of work for two days due to the left arm pain; left arm swelled; left arm became very hot; This spontaneous case was reported by a consumer and describes the occurrence of PAIN IN EXTREMITY (pain in the left arm right after the injection/left arm "hurt so bad"/out of work for two days due to the left arm pain), PERIPHERAL SWELLING (left arm swelled), VACCINATION SITE WARMTH (left arm became very hot), LIMB DISCOMFORT (thinks something is wrong with his left arm) and VACCINATION SITE MOVEMENT IMPAIRMENT (could not lift his left arm up/could not extend his left arm) in a 63-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 031L20A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     Concurrent medical conditions included Drug allergy (erythromycin) and Acid reflux (esophageal). Concomitant products included OMEPRAZOLE for Acid reflux (esophageal), VITAMINS NOS and MINERALS for an unknown indication.   On 26-Feb-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 29-Mar-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) dosage was changed to 1 dosage form. On 29-Mar-2021, the patient experienced PAIN IN EXTREMITY (pain in the left arm right after the injection/left arm "hurt so bad"/out of work for two days due to the left arm pain), PERIPHERAL SWELLING (left arm swelled) and VACCINATION SITE WARMTH (left arm became very hot). 29-Mar-2021, the patient experienced VACCINATION SITE ERYTHEMA (left arm became red at the injection site). On 30-Mar-2021, the patient experienced VACCINATION SITE MOVEMENT IMPAIRMENT (could not lift his left arm up/could not extend his left arm), DIZZINESS (dizziness), HEADACHE (headaches), PYREXIA (low grade fever), ARTHRALGIA (left shoulder "hurt so bad"/ left arm shoulder still aches) and CHILLS (cold chills). On 16-Apr-2021, the patient experienced LIMB DISCOMFORT (thinks something is wrong with his left arm). On an unknown date, the patient experienced ASTHENIA (He is still having weakness) and MYALGIA (left arm muscle still aches). The patient was treated with PARACETAMOL (TYLENOL) at a dose of 1 dosage form and IBUPROFEN at a dose of 1 dosage form. On 01-Apr-2021, DIZZINESS (dizziness), HEADACHE (headaches), PYREXIA (low grade fever) and CHILLS (cold chills) had resolved. At the time of the report, PAIN IN EXTREMITY (pain in the left arm right after the injection/left arm "hurt so bad"/out of work for two days due to the left arm pain), VACCINATION SITE MOVEMENT IMPAIRMENT (could not lift his left arm up/could not extend his left arm), ASTHENIA (He is still having weakness), ARTHRALGIA (left shoulder "hurt so bad"/ left arm shoulder still aches) and MYALGIA (left arm muscle still aches) had not resolved and PERIPHERAL SWELLING (left arm swelled), VACCINATION SITE WARMTH (left arm became very hot), LIMB DISCOMFORT (thinks something is wrong with his left arm) and VACCINATION SITE ERYTHEMA (left arm became red at the injection site) outcome was unknown.            The action taken with mRNA-1273(Moderna COVID-19 vaccine) was not applicable   This case was linked to MOD21-076927 (E2B Linked Report).   Most recent FOLLOW-UP information incorporated above includes: On 21-May-2021: Non-significant information On 04-Jun-2021: Treatment medication(ibuprofen) added. Outcome of events( Asthenia, pain in extremity, movement impairment) was changed to not recovered; Sender's Comments:  MOD21-076927: