He's having a lot of headaches; a lot of pain in his body / body is aching; feeling very sick; chest pains; joint pain; he has shortness of breath; he's going crazy on his own / he's feeling like his insides are going to burst; This is a spontaneous report received from a non-contactable reporter (Consumer or other non HCP) from medical information team. The reporter is the parent.  An adult male patient received BNT162b2, BNT162b2 omi ba.4-5 (BNT162B2, BNT162B2 OMI BA.4-5), in 2022 as dose 3 (booster), single (Batch/Lot number: unknown) 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: unknown), administration date: 2021, for COVID-19 immunization, reactions: "joint pain", "chest pains", "he has shortness of breath", "he's going crazy on his own / he's feeling like his insides are going to burst", "He's having a lot of headaches", "feeling very sick", "a lot of pain in his body / body is aching"; BNT162b2 (dose 2, single; lot number: unknown), for COVID-19 immunization, reactions: "joint pain", "chest pains", "he has shortness of breath", "he's going crazy on his own / he's feeling like his insides are going to burst", "He's having a lot of headaches", "feeling very sick", "a lot of pain in his body / body is aching". The following information was reported: HEADACHE (non-serious), outcome "not recovered", described as "He's having a lot of headaches"; PAIN (non-serious), outcome "not recovered", described as "a lot of pain in his body / body is aching"; MALAISE (non-serious), outcome "not recovered", described as "feeling very sick"; CHEST PAIN (non-serious), outcome "not recovered", described as "chest pains"; ARTHRALGIA (non-serious), outcome "not recovered", described as "joint pain"; DYSPNOEA (non-serious), outcome "not recovered", described as "he has shortness of breath"; FEELING ABNORMAL (non-serious), outcome "not recovered", described as "he's going crazy on his own / he's feeling like his insides are going to burst". The events "he's having a lot of headaches", "a lot of pain in his body / body is aching", "feeling very sick", "chest pains", "joint pain", "he has shortness of breath" and "he's going crazy on his own / he's feeling like his insides are going to burst" required physician office visit and emergency room visit. Relevant laboratory tests and procedures are available in the appropriate section. Additional information: The patient's mother called as she has questions about the side effects of the Pfizer 3 shots. She's calling on behalf of her son (patient) stating, "My son took the Pfizer in 2021. He took the last one in 2022. He took 3 of them. He's really having a lot of pain in his body. He used to go to the gym, he was healthy, he was fine. Now since he's got his last injection it's just been going down the drain. He hasn't been able for the past 2 years to do anything. He's been having chest pain. Any kind of working out he's feeling like his insides are going to burst. He's having a lot of headaches, he just feels like he's going to die. So I've been taking him to doctors and doctors and nothing seems to be helping." The mother stated that her son is "twenty" but then also added, "he was born in (Withheld)". She added, "I need help... he's in a lot of pain, and I'm afraid he's going to kill himself". She later added "yes, he's going through the joint pain, too, this is after". She wants more information about this if it's happening to other people. She asked if no one's reported anything after they take the shot, after a year or two. She later provided, "The first was in 2021 and now we're in 2023, and this is just getting worse, and I'm just afraid he's going to go kill himself because his pains are so bad and there's nothing I mean I've taken him to emergency room, I've taken him to the doctor's, he's taken X-rays his body is aching, his chest just feels the pain, and he was perfectly healthy before the shot. And that's the only thing that - he doesn't even take any medicine. I can't believe that there's no one out there like my son, you're making it seem like my son is the only one out in the whole world who has these pains. So you're saying he's going crazy on his own, that this pain is not for real". When directed back to HCP for management she stated, "They can't find, they can't see. They just know that he took the shot and they've been trying to treat it, and it doesn't seem to be working".  No follow-up attempts are possible; information about lot/batch number cannot be obtained. No further information is expected.; Sender's Comments: Linked Report(s) : US-PFIZER INC-202300076678 same reporter, patient, drug, and event; different dose;US-PFIZER INC-202300076136 same reporter, patient, drug, and event; different dose;