booster; Rash; Hives were coming like every night almost every day; I took the booster shot then the hives became so much severe; Hives were coming like every night almost every day; I took the booster shot then the hives became so much severe; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non-HCP). The reporter is the patient (Himself).  A 40-year-old male patient received bnt162b2 (BNT162B2), administered in arm left, administration date 18Nov2021 17:30 (Lot number: FG3527) at the age of 40 years as dose 3 (booster), single for covid-19 immunisation. The patient had no relevant medical history. Concomitant medication(s) included: FLU VACCINE VII taken for immunisation, administration date 15Oct2021. Vaccination history included: Bnt162b2 (Dose 2, date: 21Apr, Lot number: ER8729, All of them were on my left arm.), administration date: 21Apr2021, when the patient was 39 years old, for COVID-19 immunization, reaction(s): "Rash", "Hives were coming like every night almost every day; I took the booster shot then the hives became so much severe"; Bnt162b2 (Dose 1, date : in Apr, Lot number: ER8737, All of them were on my left arm.), administration date: Apr2021, when the patient was 39 years old, for COVID-19 immunization, reaction(s): "Rash"; Bnt162b2 (Dose 1, date: in Apr, Lot number: ER8737, All of them were on my left arm.), administration date: Apr2021, when the patient was 39 years old, for COVID-19 immunization, reaction(s): "Hives were coming like every night almost every day; I took the booster shot then the hives became so much severe". The following information was reported: IMMUNISATION (non-serious) with onset 18Nov2021 17:30, outcome "unknown", described as "booster"; RASH (non-serious) with onset 2021, outcome "unknown", described as "Rash"; URTICARIA (non-serious), CONDITION AGGRAVATED (non-serious) all with onset 2021, outcome "not recovered" and all described as "Hives were coming like every night almost every day; I took the booster shot then the hives became so much severe". Therapeutic measures were taken as a result of rash, urticaria, condition aggravated.  Additional Information: It was reported that the patient wants to report the side effect after he got the COVID Vaccine booster shot. Yes, that's the booster shot actually it's (incomplete sentence), so far, he got like 3 shot and he have the side effect. He was getting the rash and hives. He can explain it more so, he got the vaccine in Apr, his second shot was 21Apr and around Sep and Oct he started having hives, actually minor but it was getting more and more every day, by that time he called doctor and then he started taking antihistamine in the medicines to suppress the hives and hives were coming like every night almost every day if he don't take the antihistamine 'it usually goes fast and takes time to go away' (Not clarified over the call) so he started taking every day and then he took the booster shot a couple weeks ago without knowing (incomplete sentence) it's actually 18Nov and he didn't know the hives could be related to the COVID Vaccine but he took the booster shot then the hives became so much severe. When paraphrased the concern, consumer stated, "So I am suspecting it could be related to COVID Vaccine through Pfizer vaccine. he found a website and there were lot of people discussing the same thing (Further clarification unknown, hence split case was not made). So, he just wanted to report hoping this can 'arise' some awareness." Other medical conditions: Consumer stated, "No, I never had allergic reaction before, like prior to COVID Vaccine (Further clarification unknown)." Treatment in response to adverse event: Consumer stated, "Zyrtec, I think it is a major brand for the antihistamine. Dose of Zyrtec: Consumer stated, "I am taking 5 mg daily. I have something that I want to explain, so it helps me for the hives but at the same time Zyrtec makes me drowsy so, I tried another antihistamine which is called Allegra but that was not effective, so I change back to Zyrtec, so Zyrtec seems like it is more effective." Time of vaccination: Consumer stated, "The first shot I got in morning maybe between 10 or 11am. The 2nd shot was about the similar time like 11 or 10am. The booster shot I got it at 5:30 pm, in the afternoon." Patient received Flu vaccine prior to vaccination within 4 weeks: (Unspecified Flu Vaccine).  Follow-up attempts are completed. No further information is expected.