Fever; Chills; Allergy; My armpit is swollen and painful; My armpit is swollen and painful/some sore; I started to feel bad on Sunday morning; booster; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A 54 year-old male patient received bnt162b2 (BNT162B2) (Batch/Lot number: unknown) as dose 3, (booster dose), single for covid-19 immunisation. Relevant medical history included: "Hyperyension" (unspecified if ongoing). Concomitant medication(s) included: TELMISARTAN taken for hypertension. Vaccination history included: Bnt162b2 (DOSE 1, SINGLE), administration date: 27Mar2021, for COVID-19 immunization; Bnt162b2 (DOSE 2, SINGLE), administration date: 17Apr2021, for Covid-19 immunization. The following information was reported: PYREXIA (non-serious), outcome "unknown", described as "Fever"; CHILLS (non-serious), outcome "unknown", described as "Chills"; HYPERSENSITIVITY (non-serious), outcome "unknown", described as "Allergy"; PERIPHERAL SWELLING (non-serious), outcome "unknown", described as "My armpit is swollen and painful"; PAIN IN EXTREMITY (non-serious), outcome "unknown", described as "My armpit is swollen and painful/some sore"; MALAISE (non-serious), outcome "unknown", described as "I started to feel bad on Sunday morning"; IMMUNISATION (non-serious), outcome "unknown", described as "booster". The patient stated anatomical site of administration was left. The patient got the booster shot on Saturday at 2 o'clock and I had stayed with the Pfizer throughout the whole process at the two months prior and six months later. The dose was available that week and experienced a fever, chills, allergy and some sore but still was dealing with but the one thing that was unique and patient did had to call his doctor on this on the blood site where, he got the shot. The patient's armpit was swollen and painful and he tried to call my physician who said that, it was something that they had seen and it was a side effect. So, patient just did not see that, were reported any of those report it at any of those stop that from immediate. So, the patient just started with his duty to help and report. The patient stated, he got the shot on Saturday. He started to feel bad on Sunday morning and the arm pit then, which was where to keep thing that started to happen sometimes on Sunday. The patient was not able to tell exactly, when that happened (Further not clarified hence, captured in tab). The patient had no prior vaccinations (within 4 weeks), no other vaccines, no flu shot, nothing. Therapeutic measures were taken as a result of pyrexia, chills, hypersensitivity, swelling, pain, pain, malaise which included Advil or Tylenol every 4 or 5 hours. The patient was taking an Advil sometimes. Took 200 or at the most took 400(not clear), there was a new kind of one out there which got Advil and Tylenol together and patient took one of those and was not sure really what the, he thought its 250 Tylenol (voice not clear) and then 125 on the Advil (not clear) dual action. The patient was just waiting for this hopefully, till this one to go down under arm. Patient's doctor said, it would be couple of more days so, hopefully and then it would go from there. No follow-up attempts are possible; information about lot/batch number cannot be obtained. No further information is expected.