he said he couldn't see; his eyes started to roll backward, became extremely pale; his blood pressure and heart rate dropped; his blood pressure and heart rate dropped; The allergist said it was not an allergic reaction by the presentation, but possibly vasovagal (except he's 6).; My son's skin turned blotchy immediately after the vaccine.  It started in the vaccine arm and then went through his other arm and his legs.; nauseous; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP). The reporter is the parent.  A 6-year-old male patient received BNT162b2 (BNT162B2), on 26Aug2022 at 11:30 as dose 1, single (Lot number: FL2757) at the age of 6 years, in left arm for covid-19 immunisation. The patient's relevant medical history was not reported. There were no concomitant medications. The following information was reported: RASH MACULAR (non-serious) with onset 26Aug2022 at 12:00, outcome "recovering", described as "My son's skin turned blotchy immediately after the vaccine.  It started in the vaccine arm and then went through his other arm and his legs."; PRESYNCOPE (non-serious) with onset 26Aug2022 at 12:00, outcome "recovering", described as "The allergist said it was not an allergic reaction by the presentation, but possibly vasovagal (except he's 6)."; BLINDNESS (medically significant) with onset 26Aug2022 at 12:00, outcome "recovering", described as "he said he couldn't see"; BLOOD PRESSURE DECREASED (non-serious), HEART RATE DECREASED (non-serious) all with onset 26Aug2022 at 12:00, outcome "recovering" and all described as "his blood pressure and heart rate dropped"; EYE DISORDER (non-serious) with onset 26Aug2022 at 12:00, outcome "recovering", described as "his eyes started to roll backward, became extremely pale"; NAUSEA (non-serious) with onset 26Aug2022 at 12:00, outcome "recovering", described as "nauseous". The events "he said he couldn't see", "his eyes started to roll backward, became extremely pale", "his blood pressure and heart rate dropped", "the allergist said it was not an allergic reaction by the presentation, but possibly vasovagal (except he's 6).", "my son's skin turned blotchy immediately after the vaccine.  it started in the vaccine arm and then went through his other arm and his legs." and "nauseous" required physician office visit. The patient underwent the following laboratory tests and procedures: Blood pressure measurement: dropped, notes: blood pressure and heart rate, dropped; Heart rate: dropped, notes: blood pressure and heart rate dropped. Therapeutic measures were not taken as a result of blindness, eye disorder, blood pressure decreased, heart rate decreased, presyncope, rash macular, nausea.  Additional information: No other vaccine in four weeks. No other medications in two weeks. My son's skin turned blotchy immediately after the vaccine. It started in the vaccine arm and then went through his other arm and his legs. We waited at the pediatrician's office for 30 mins because I had a bad reaction to the Pfizer vaccine.  At 30 min post vaccine, my son became nauseous, his eyes started to roll backward, became extremely pale, he said he couldn't see and his blood pressure and heart rate dropped. The allergist said it was not an allergic reaction by the presentation, but possibly vasovagal (except he's 6). I wanted to notify Pfizer right away since it's an adverse reaction in a child and I had severe reactions to the vaccine myself. If anything gets worse I'll send you an update. It was a very scary event that occurred and I hope Pfizer is looking into all adverse events, especially with kids, so doctors have a better understanding of what may be happening. Patient did not received any treatment. Patient did not have covid prior vaccination. Patient was not covid tested post vaccination. No Known allergies.-  Follow-up attempts are completed. No further information is expected.