Hot, injected arm; Not doing so great; Very sick; Burning hot from inside/like there is heat irradiating into my bone, it was hot; I feel like swollen; Rash; Burning deep to the bones, injected arm; Bump on the injection area/very hard ball in the area where they gave me the shot; Rasharound injection area; Whole left side is reacting; Pain from the hand to neck; Pain from the hand to neck/it shoots down my leg/pain in the arm/Hurting from inside/not feeling my arm/ it hurts; Arm numbness/arm is going completely numb/its going to my neck/it goes all the way to my hand; Can't move her arm; She can't sleep, patient states last night wasn't able to sleep; This spontaneous case was reported by a consumer and describes the occurrence of NECK PAIN (Pain from the hand to neck), PAIN IN EXTREMITY (Pain from the hand to neck/it shoots down my leg/pain in the arm/Hurting from inside/not feeling my arm/ it hurts), HYPOAESTHESIA (Arm numbness/arm is going completely numb/its going to my neck/it goes all the way to my hand), MOBILITY DECREASED (Can't move her arm) and INSOMNIA (She can't sleep, patient states last night wasn't able to sleep) in a female patient of an unknown age who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 037A21B and 038A21A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     No Medical History information was reported.   On 19-Mar-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 16-Apr-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 09-Aug-2021, the patient experienced INSOMNIA (She can't sleep, patient states last night wasn't able to sleep). On an unknown date, the patient experienced NECK PAIN (Pain from the hand to neck), PAIN IN EXTREMITY (Pain from the hand to neck/it shoots down my leg/pain in the arm/Hurting from inside/not feeling my arm/ it hurts), HYPOAESTHESIA (Arm numbness/arm is going completely numb/its going to my neck/it goes all the way to my hand), MOBILITY DECREASED (Can't move her arm), VACCINATION SITE WARMTH (Hot, injected arm), MALAISE (Not doing so great), ILLNESS (Very sick), BURNING SENSATION (Burning hot from inside/like there is heat irradiating into my bone, it was hot), SWELLING (I feel like swollen), RASH (Rash), VACCINATION SITE PAIN (Burning deep to the bones, injected arm), VACCINATION SITE SWELLING (Bump on the injection area/very hard ball in the area where they gave me the shot), VACCINATION SITE RASH (Rasharound injection area) and MYALGIA (Whole left side is reacting). At the time of the report, NECK PAIN (Pain from the hand to neck), PAIN IN EXTREMITY (Pain from the hand to neck/it shoots down my leg/pain in the arm/Hurting from inside/not feeling my arm/ it hurts), HYPOAESTHESIA (Arm numbness/arm is going completely numb/its going to my neck/it goes all the way to my hand), MOBILITY DECREASED (Can't move her arm), INSOMNIA (She can't sleep, patient states last night wasn't able to sleep), VACCINATION SITE WARMTH (Hot, injected arm), MALAISE (Not doing so great), ILLNESS (Very sick), BURNING SENSATION (Burning hot from inside/like there is heat irradiating into my bone, it was hot), SWELLING (I feel like swollen), RASH (Rash), VACCINATION SITE PAIN (Burning deep to the bones, injected arm), VACCINATION SITE SWELLING (Bump on the injection area/very hard ball in the area where they gave me the shot), VACCINATION SITE RASH (Rasharound injection area) and MYALGIA (Whole left side is reacting) had not resolved.            No relevant concomitant medications reported.  No treatment medications reported.   This case was linked to MOD-2021-281314 (Patient Link).   Most recent FOLLOW-UP information incorporated above includes: On 09-Aug-2021: Follow-up received contains additional events and outcome of events was updated.