bumps and welts are getting worse and are now on her head and all over the side of her body/ A few days after receiving booster dose Pfizer Vaccine started breaking out; bumps and welts are getting worse and are now on her head and all over the side of her body; Itches so bad can't stand it/ itching of these bumps and welts; Sometimes have trouble breathing; Has knots on head/ Sometimes the knots are half as big as an egg yolk; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP) from medical information team. The reporter is the patient.  An 83-year-old female patient received BNT162b2 (BNT162B2), on 29Dec2021 as dose 3 (booster), single (Lot number: FE3594) at the age of 82 years, in left arm for covid-19 immunisation. The patient had no relevant medical history. There were no concomitant medications. Vaccination history included: BNT162b2 (DOSE 1,SINGLE; lot number : 8737 or 8727; Route of administration: left arm), administration date: 20May2021, when the patient was 81-year-old, for COVID-19 Immunization; BNT162b2 (DOSE 2,SINGLE; lot number :EWO162 or EW0162; Route of administration: left arm), administration date: 08Jun2021, when the patient was 81-year-old, for COVID-19 Immunization. The following information was reported: RASH (non-serious), outcome "not recovered", described as "bumps and welts are getting worse and are now on her head and all over the side of her body/ A few days after receiving booster dose Pfizer Vaccine started breaking out"; URTICARIA (non-serious), outcome "not recovered", described as "bumps and welts are getting worse and are now on her head and all over the side of her body"; PRURITUS (non-serious), outcome "not recovered", described as "Itches so bad can't stand it/ itching of these bumps and welts"; DYSPNOEA (non-serious), outcome "not recovered", described as "Sometimes have trouble breathing"; MASS (non-serious), outcome "not recovered", described as "Has knots on head/ Sometimes the knots are half as big as an egg yolk". The events "bumps and welts are getting worse and are now on her head and all over the side of her body/ a few days after receiving booster dose pfizer vaccine started breaking out", "bumps and welts are getting worse and are now on her head and all over the side of her body", "itches so bad can't stand it/ itching of these bumps and welts", "sometimes have trouble breathing" and "has knots on head/ sometimes the knots are half as big as an egg yolk" required physician office visit. Therapeutic measures were taken as a result of rash, urticaria, pruritus, dyspnoea, mass.  Additional information: Caller stated that a few days after receiving the vaccine developed large bumps and welts that come and go and she still has them. Caller stated that the bumps and welts are getting worse and are now on head and all over the side of her body. Caller stated that the 1st and 2nd Pfizer Covid19 vaccines did not bother her. Comes up kind of like in bumps and started spreading big whelps covering hand. Itches so bad can't stand it. Has knots on head, big knows. Caller stated had seen a dermatologist and allergy doctor who prescribed her for steroids and creams but the bumps and welts have not gone away. Zyrtec and Claritin was given to take twice a day. Zyrtec(NDC/UPC: Unknown, does not see on bottle; lot number: WJ49274; expiration: Feb2025, product strength and count size dispensed: 10mg, 60 tablets); Claritin (Bottle is so small and is blind, lot number: 2CEL9768 NDC: Unknown, Expiration: Nov2023, product strength and count size dispensed:10mg, 30 count). The patient received steroid shot and didn't' do any good either. Also used Benadryl to rub on. Zyrtec and Claritin are just not getting the break out. When go out to water flowers, before done out of breathe have to come back in house, thought it effected lungs. Started in the last week noticing having trouble breathing and was about the same. There were no other vaccinations within four weeks prior to the first administration date of the suspect vaccine. There were no AE(s) following prior vaccinations. There were no relevant tests.