heart arrhythmia; headache; It was from the back of his head down to his spine; heart started hurting; This is a spontaneous report from a contactable consumer (patient) received from a Pfizer-sponsored program. A 30-year-old male patient received BNT162B2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE, Formulation: Solution for injection, Lot number: EW0183), via an unspecified route of administration in arm right on 25Jun2021 at 11:30 (at the age of 30-year-old) as a dose 1, single for COVID-19 immunisation. The family medical history included his family has cardiovascular issues on his dad's side. The patient's medical history (including any illness at time of vaccination) included allergic to pollen. The patient's concomitant medications were not reported. History of all previous immunization with the Pfizer vaccine considered as suspect (or patient age at first and subsequent immunizations if dates of birth or immunizations are not available) was reported as this was his first dose. Additional vaccines administered on same date of the Pfizer suspect was reported as none. Prior vaccinations (within 4 weeks) prior to the first administration date of the suspect vaccine(s) were reported as none. The AE(s) following prior vaccinations were reported as none. Enquired, inbound call received, warm transfer from (name withheld) with DSU, NTID - #, Reportum - #. The caller was transferred from one place to another, CEP 159558. The caller was a consumer who received his first vaccine dose on 25Jun2021 in his right arm, lot: EW0183 or EO183. There is a date on the back of the card that says 03Sep2020. Stated that, the reporter was going to be a healthcare professional (dental hygienist) in a couple of months. It was required for the dental field so he had to get the vaccine. Afterwards the patient experienced a headache and he went to the emergency room. It was from the back of his head down to his spine and he lost control of his knees for some reason. The headache started 2 days prior to when he went to the emergency room on 08Jul2021 in the afternoon. He still has the headache a little bit. It was a little better. After his first dose of the Covid vaccine, his heart started hurting about 10 days later. When he went to the hospital, he started getting heart arrhythmia and was in the emergency room on 10Jul2021 at 22:00. When he went to the hospital on the first day, he was not admitted, he was in the emergency room. It lasted from 10Jul2021, 11Jul2021, 12Jul2021, and part of 13Jul2021. Stated that, he was 80% recovered. The caller reported that, he was supposed to get his second dose of the vaccine tomorrow and asked, was it ok or safe to postpone that dose to a later time or would that cause side effects. He wanted to go to the doctor and find out whether the heart problems were from the vaccine. Stated that, the caller comes on the line. He verified information provided by transfer agent. Stated that, he has a question regarding the timeless between the first and second dose. Stated that, he knows it was supposed to be 2 weeks max. He had an arrhythmia, it was very high up and he ended up in the hospital. The patient was hospitalized for the event arrythmia. The EKG was normal, but to be on the safe side he was hoping to postpone the second dose. He asked whether he can get the second dose after 4 weeks if possible. The AEs require a visit to emergency room was reported as yes and physician office was reported as no. On 10Jul2021, the patient underwent lab tests and procedures which included blood test, resulted as unknown results and EKG, resulted as normal, heart started hurting, resulted as increased. The outcome of the events for heart arrythmia was recovered on 13Jul2021 and for headache was recovering while for the other events was unknown.