Chest pain; Pain on chest, neck and head; heart palpitations and some of them were severe.; Breathing issue; my legs and feet were hurting at times; my legs and feet were hurting at times, and there was occasional swelling; Tingling; Numbness; Pain on chest, neck and head; Pain upon inhaling in her chest neck and base of the head.; Vomiting; Side effects got worsen; This spontaneous case was reported by a consumer (subsequently medically confirmed) and describes the occurrence of CHEST PAIN (Pain upon inhaling in her chest neck and base of the head.), VACCINATION COMPLICATION (Side effects got worsen), CHEST PAIN (Chest pain), NECK PAIN (Pain on chest, neck and head) and PALPITATIONS (heart palpitations and some of them were severe.) in a 70-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 008B21A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     Concurrent medical conditions included Allergy to antibiotic (Allergic to Erythromycin), Drug allergy (Tramadol allergy), Drug allergy (Demerol allergy), Fragrance sensitivity (Allergic to synthetic fragrance.), Fibromyalgia since 2006, Palpitations (heart palpitations) since 2005 and Sinus disorder (allergy issues.). Concomitant products included ACETYLCYSTEINE (NAC 500) for Cataract, BONE AND JOINT HEALTH and MAGNESIUM for Osteoporosis, FLECAINIDE for Palpitation, VITAMINS NOS and CALCIUM for an unknown indication.    On 01-Apr-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 02-Apr-2021, the patient experienced CHEST PAIN (Pain upon inhaling in her chest neck and base of the head.) and VOMITING (Vomiting). In April 2021, the patient experienced VACCINATION COMPLICATION (Side effects got worsen). On an unknown date, the patient experienced CHEST PAIN (Chest pain), NECK PAIN (Pain on chest, neck and head), PALPITATIONS (heart palpitations and some of them were severe.), DYSPNOEA (Breathing issue), PAIN IN EXTREMITY (my legs and feet were hurting at times), PERIPHERAL SWELLING (my legs and feet were hurting at times, and there was occasional swelling), PARAESTHESIA (Tingling), HYPOAESTHESIA (Numbness) and HEADACHE (Pain on chest, neck and head). On 05-May-2021, PALPITATIONS (heart palpitations and some of them were severe.) had resolved. At the time of the report, CHEST PAIN (Pain upon inhaling in her chest neck and base of the head.) had resolved, VACCINATION COMPLICATION (Side effects got worsen), CHEST PAIN (Chest pain), NECK PAIN (Pain on chest, neck and head), PAIN IN EXTREMITY (my legs and feet were hurting at times), PERIPHERAL SWELLING (my legs and feet were hurting at times, and there was occasional swelling), PARAESTHESIA (Tingling), HYPOAESTHESIA (Numbness), VOMITING (Vomiting) and HEADACHE (Pain on chest, neck and head) outcome was unknown and DYSPNOEA (Breathing issue) was resolving.        The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) was unknown.       Patient experienced pain in chest, shoulder, neck and head during every inhalation but it was subsided on exhalation. It mainly happened when patient laid down. Patient was recommended to visit the emergency room but he has not followed the recommendation. Patient was suggested to take Flecainide pills 2x a day for 10 days to see if it could interrupt the cycle of heart palpitation. Patient has taken Flecainide for almost 6 years starting in 2012 but in 2018 the Cardiologist has stopped the medication since patient was mostly free of palpitation for over 3 years, until the Moderna shot. Patient was advised not to take second dose of vaccine.   Most recent FOLLOW-UP information incorporated above includes: On 02-Apr-2021: Follow-up information received on 05-APR-2021.New AE  Side effects got worsen/ Condition aggravated, pain on chest, neck and head, concomitant medications were reported. On 02-Apr-2021: Significant follow: Patient information updated , concomitant drug are added ,1# Event outcome updated On 01-Aug-2021: Follow-up document was received. Additional events pain in extremity, peripheral swelling, paraesthesia and hypoaesthesia  were included, outcome of event palpitation was updated to recovered/resolved. Patient was suggested to use compression socks and advised to take blood test. Patient's tab for relevant medical history was updated since allergy to drugs was coded together  in the initial case.It contains significant information.