I tried paddle boarding recently in July2023, the exertion of paddling would cause pain; dizzy; the pain in chest, abdomen; the pain in chest, abdomen; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP) from medical information team. The reporter is the patient.  A 39-year-old male patient received BNT162b2 (BNT162B2), on 24Feb2022 as dose 2, single (Lot number: FK9896) for covid-19 immunisation. The patient's relevant medical history and concomitant medications were not reported. Vaccination history included: BNT162b2 (DOSE 1, SINGLE; Lot number: 30145BA), administration date: 19Oct2021, for Covid-19 immunization, reaction(s): "difficulty thinking", "Since the first dose, I have had pain between my chest and abdomen on my left side, behind and under the ribs", "Since the first dose, I have had pain between my chest and abdomen on my left side, behind and under the ribs", "Since the first dose, I have had pain between my chest and abdomen on my left side, behind and under the ribs", "When I get that area too stressed (lower left chest, upper left abdomen area), I will feel the pain", "dizzy", "lightheaded", "processing thoughts". The following information was reported: PAIN (non-serious), outcome "unknown", described as "I tried paddle boarding recently in July2023, the exertion of paddling would cause pain"; DIZZINESS (non-serious), outcome "unknown", described as "dizzy"; CHEST PAIN (non-serious), ABDOMINAL PAIN (non-serious), outcome "not recovered" and all described as "the pain in chest, abdomen".  Additional information: Patient received the first dose of the Pfizer Covid 19 vaccine (unknown to caller if monovalent or bivalent) back on 19Oct2021 and issues started after the first dose. Since the first dose, he had pain between his chest and abdomen on his left side, behind and under the ribs. When he got that area too stressed (lower left chest, upper left abdomen area), he will feel the pain building up in that area, he will get dizzy, lightheaded and had difficulty thinking or processing thoughts - all these typically associated with pain in chest and abdomen. This had happened a couple of times. It was pretty consistent, if he relaxed and he was not doing anything, he typically don't feel anything. But once he started getting active, ie: twisting, bending, trying to pick up heavy items, it may act up. He tried paddle boarding recently in July2023 to see how much he could handle, and the exertion of paddling would cause pain. He felt the pain and stopped before he got too dizzy. At first it was calm and easy and when he turned around and faced the wind, he found out really quick that he could not continue since he started to feel the pain. He used to rock climb but have not done that. He noticed that if he avoided doing certain things, he can avoid the pain in chest, abdomen and dizziness. Like at the gym, he will try to do a little bit but if he pushed it too far, he realized that he needed to stop. This was an ongoing bizarre issue. His doctor was still trying to figure it out and I just wanted to narrow it down a bit.; Sender's Comments: Linked Report(s) : US-PFIZER INC-202300283414 Same product, patient, different AEs, different dose;