Her right arm swelled bigger than a baseball; Blisters down her side and into her breast and armpit; Pain in right armpit area; right arm became red/Then it became red and the redness went through her arm and into her breast and arm pit.; pain in the right armpit area; lymph nodes under the arm pit are in a lot of pain; Two of her lymph nodes under her right armpit are 3.4 in long/large infected lymph nodes; Patient was not feeling good after vaccination; Developed a red rash on the arm at the injection site as big as size of base ball; Rash was painful; Had lot more energy than before; couldn't move/can't use her right arm, the more she uses it the bigger the swelling gets; Hard time breathing; Patient sweats so much that her hair gets wet; Patient can't get warm and feels cold; Calcium scan of the heart showed enlarged heart; Arthritis; This spontaneous case was reported by a consumer and describes the occurrence of MOBILITY DECREASED (couldn't move/can't use her right arm, the more she uses it the bigger the swelling gets), DYSPNOEA (Hard time breathing), HYPERHIDROSIS (Patient sweats so much that her hair gets wet), FEELING COLD (Patient can't get warm and feels cold) and CARDIOMEGALY (Calcium scan of the heart showed enlarged heart) in a 44-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 038B21A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     No Medical History information was reported.    On 10-Apr-2021, the patient received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 10-Apr-2021, the patient experienced FEELING ABNORMAL (Patient was not feeling good after vaccination). In April 2021, the patient experienced MOBILITY DECREASED (couldn't move/can't use her right arm, the more she uses it the bigger the swelling gets), DYSPNOEA (Hard time breathing), HYPERHIDROSIS (Patient sweats so much that her hair gets wet), FEELING COLD (Patient can't get warm and feels cold), CARDIOMEGALY (Calcium scan of the heart showed enlarged heart), ARTHRITIS (Arthritis), ENERGY INCREASED (Had lot more energy than before), RASH (Rash was painful) and VACCINATION SITE RASH (Developed a red rash on the arm at the injection site as big as size of base ball). On an unknown date, the patient experienced PERIPHERAL SWELLING (Her right arm swelled bigger than a baseball), BLISTER (Blisters down her side and into her breast and armpit), PAIN IN EXTREMITY (Pain in right armpit area), ERYTHEMA (right arm became red/Then it became red and the redness went through her arm and into her breast and arm pit.), AXILLARY PAIN (pain in the right armpit area), LYMPH NODE PAIN (lymph nodes under the arm pit are in a lot of pain) and LYMPHADENOPATHY (Two of her lymph nodes under her right armpit are 3.4 in long/large infected lymph nodes). The patient was treated with CODEINE PHOSPHATE, PARACETAMOL (TYLENOL WITH CODEINE) at a dose of 1 dosage form. In April 2021, CARDIOMEGALY (Calcium scan of the heart showed enlarged heart) had resolved. At the time of the report, MOBILITY DECREASED (couldn't move/can't use her right arm, the more she uses it the bigger the swelling gets), DYSPNOEA (Hard time breathing), HYPERHIDROSIS (Patient sweats so much that her hair gets wet), FEELING COLD (Patient can't get warm and feels cold), FEELING ABNORMAL (Patient was not feeling good after vaccination), PERIPHERAL SWELLING (Her right arm swelled bigger than a baseball), BLISTER (Blisters down her side and into her breast and armpit), ENERGY INCREASED (Had lot more energy than before), PAIN IN EXTREMITY (Pain in right armpit area), ERYTHEMA (right arm became red/Then it became red and the redness went through her arm and into her breast and arm pit.), RASH (Rash was painful), AXILLARY PAIN (pain in the right armpit area), LYMPH NODE PAIN (lymph nodes under the arm pit are in a lot of pain), LYMPHADENOPATHY (Two of her lymph nodes under her right armpit are 3.4 in long/large infected lymph nodes) and VACCINATION SITE RASH (Developed a red rash on the arm at the injection site as big as size of base ball) outcome was unknown and ARTHRITIS (Arthritis) had resolved.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On 01-Mar-2021, Computerised tomogram coronary artery: normal (normal) Normal. In April 2021, Body temperature: 102 (High) 102 degrees Fahrenheit. In April 2021, Computerised tomogram: normal (normal) Normal and showed no blood clots. In April 2021, Computerised tomogram coronary artery: enlarged heart (abnormal) Enlarged heart.     For mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular), the reporter did not provide any causality assessments.   In treatment medications Steroids was also included.  On 28-JUN-2021 Patient went to a breast cancer  doctor for checkup and determined her lymph nodes looks normal ,not cancerous.  Concomitant product details was not provided by the reporter.  Action taken with mRNA-1273 in response to the event was not applicable.   Most recent FOLLOW-UP information incorporated above includes: On 02-Jul-2021: Added secondary reporter details, treatment medication. Added new events Blister, pain in extremity, Erythema, Axillary pain, Lymph node pain, Lymphadenopathy, Vaccination site Rash, peripheral swelling.