couldn't sleep; headache; feeling really hot from the inside; Itchy; This is a spontaneous report from a contactable consumer (Patient). A 16-years-old male patient received first dose of bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE, Solution for injection, Lot Number: EN6203), via an unspecified route of administration on 26Feb2021(at the age of 16-years-old) administered in Arm Right as a single dose for COVID-19 immunisation. Medical history included Asthma, epilepsy, Allergy to Penicillin and sulfa (all from an unknown date and unknown if ongoing).There were no concomitant medications.The patient did not receive any other vaccines within 4 weeks prior to the COVID vaccine. On an unknown date, the patient experienced couldn't sleep. On 01Mar2021, the patient experienced Itchy, really hot from the inside, headache. It was reported that received Pfizer's COVID vaccine at 3 pm on Friday, 26Feb2021. "He was totally fine that day, but on Sunday night at 1 am, he had a headache and a wave of heat through his body that felt very hot. His whole body began to itch. He had red marks, no hives, and was itching all over. I gave Benadryl and he felt fine afterwards. Today (02Mar2021), he also had the same thing; some headache, heat, and then his legs and whole body became extremely itchy and he couldn't go to practice or anything. The Pediatrician said it didn't sound like an allergic reaction because he didn't have any hives." Caller was wondering if this has been reported before. Responded per EUA fact sheet for recipients and caregivers under "WHAT ARE THE RISKS OF THE PFIZER-BIONTECH COVID-19 VACCINE?" and told caller limited data available regarding reports of allergic reactions of whether they were delayed allergic reactions or within a few minutes to 1 hour after the dose. Told caller EUA has been revised since 25Feb2021 to include reports of side effects of non-severe allergic reactions and severe allergic reactions. Spoke from EUA fact sheet for HCPs under "Local and Systemic Adverse Reactions Solicited in the Study 2" regarding the reported adverse events from the study were within 1 to 7 days from either dose of the vaccine. She is calling because her son was vaccinated. He had his first vaccine this past Friday. She called his pediatrician who was not sure if it is a reaction and she said to call. On Monday at 1:00AM he started to get a headache. More importantly he got to feeling really hot from the inside. He got really itchy. He couldn't sleep and had scratch marks all over him. There were no bumps or hives. Gave him Benadryl and he seemed ok. Today the same thing happened. He got a headache, got hot, and his body is completely itchy. He couldn't do anything. Basically the pediatrician said not a lot of kids are getting vaccinated and she didn't have a lot of information.The pediatrician ruled out an allergic reaction to food because he didn't have hives. The pediatrician thinks this was his body's reaction to the vaccine. Caller is his mom and she has an allergy to Penicillin and Sulfa, but the patient does not. Mother calling about her son who received COVID19 Vaccine. On Monday at 1:00AM he started to get a headache. More importantly he got to feeling really hot from the inside. He got really itchy. He couldn't sleep and had scratch marks all over him. There were no bumps or hives. Gave him Benadryl and he seemed ok. Today the same thing happened. He got a headache, got hot, and his body is completely itchy. He couldn't do anything. Caller also wants to report this because it may be a reaction to the vaccine. Time the Vaccination Was Given between 3:30PM and 3:45PM. The adverse event did not result emergency room visit. The patient was visited to Physician Office for the events.Therapeutic measures were taken as a result of itchy.The outcome of the events was unknown.  No follow-up attempts are possible. No further information is expected.