Developed red bumps of forearms/Both of his forearms were covered in red bumps; the bumps were inflamed; An allergic reaction; Injection site redness/hardness; vaccination site being red, inflamed, and warm to touch; vaccination site being red, inflamed, and warm to touch; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP) from medical information team. The reporter is the parent.  A 12 year-old male patient received bnt162b2 (BNT162B2), administered in arm left, administration date 30Jul2021 (Lot number: EW1077) at the age of 12 years as dose 1, single for covid-19 immunisation. Relevant medical history included: "seasonal allergies" (unspecified if ongoing), notes: had seasonal allergies on and off, regularly took Zyrtec. There were no concomitant medications. The following information was reported: URTICARIA (non-serious) with onset 05Aug2021, outcome "recovered" (09Aug2021), described as "Developed red bumps of forearms/Both of his forearms were covered in red bumps"; INFLAMMATION (non-serious) with onset Aug2021, outcome "recovered" (2021), described as "the bumps were inflamed"; HYPERSENSITIVITY (non-serious) with onset Aug2021, outcome "unknown", described as "An allergic reaction"; VACCINATION SITE ERYTHEMA (non-serious) with onset Aug2021, outcome "not recovered", described as "Injection site redness/hardness"; VACCINATION SITE WARMTH (non-serious) with onset Aug2021, outcome "recovered" (2021), VACCINATION SITE INFLAMMATION (non-serious) with onset Aug2021, outcome "unknown" and all described as "vaccination site being red, inflamed, and warm to touch". The event "an allergic reaction" was evaluated at the physician office visit. Therapeutic measures were taken as a result of urticaria, inflammation.  Additional information: The reporter stating events as non serious.Mother reporting that her son received first dose on 30Jul2021 and second dose is due this Friday. Developed red pumps of forearms. Pediatrician confirmed it was an allergic reaction. Also experienced injection site redness/hardness, still remains present and seems to be healing/fading per mother. Mother references injection site as COVID arm from what she has found information wise. His site looked different than anyone else in household or anyone we know.In general, local side effects; the ones you get on the arm where you got the shot (such as injection site redness and injection site swelling) were mostly mild-to-moderate in severity and resolved within 1 to 2 days.She confirms her son developed the red bumps on his forearms on 05Aug2021. She states Dr. Withheld was not in the office, so her son saw his wife, Dr. Withheld, who prescribed a topical steroid, an oral steroid, and an allergy medicine. These were used in combination for three days and the bumps were all gone. He was totally clear by 09Aug2021. She clarifies she noticed the injection site a few days later, after the bumps were gone, maybe two days later. It was very different looking. She states her son likes his bedroom cold, it is like an ice box and she noticed the red marks when he came out of his bedroom. The marks were so much warmer than the rest of his body. List all vaccines administered on same date with the Pfizer vaccine was None reported. The patient did not receive any other vaccines within four weeks prior to the vaccination.  No follow-up attempts are possible. No further information is expected.