booster; had a bright red strawberry colored; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP) from medical information team. The reporter is the patient.  A 79 year-old female patient received bnt162b2 (BNT162B2), administration date 20Dec2021 13:15 (Lot number: FH8030) at the age of 79 years as dose 3 (booster), single for covid-19 immunisation. Relevant medical history included: "allergic to latex" (unspecified if ongoing), notes: allergic to latex, spandex, strawberry, shellfish and a slue of things; "allergic to spandex" (unspecified if ongoing); "at her age, almost 80 years old, she gets sore once in a while" (unspecified if ongoing); "she has hives" (unspecified if ongoing); "boost her thyroid" (unspecified if ongoing); "sneeze" (unspecified if ongoing), notes: ink print of news papers on a rack dried for 3 to 4 days, it makes  sneeze something fierce.; "allergic to strawberry" (unspecified if ongoing); "allergic to shellfish" (unspecified if ongoing); "She has lots of allergies" (unspecified if ongoing). Concomitant medication(s) included: SYNTHROID taken for thyroid disorder (ongoing); MEDROL [METHYLPREDNISOLONE ACETATE] taken for rosacea; BENADRYL taken for urticaria; VITAMIN D [COLECALCIFEROL]; TYLENOL taken for pain. Vaccination history included: Bnt162b2 (1st dose- 13Apr2021 , Lot Number: ER8731), administration date: 13Apr2021, when the patient was 78 years old, for COVID-19 Immunization, reaction(s): "When she first got the vaccine it was the size of a dime and then got to the size of a quarter at it's largest size"; Bnt162b2 (2nd dose- 04May2021 , Lot Number: ER8736), administration date: 04May2021, when the patient was 78 years old, for COVID-19 Immunization, reaction(s): "mastectomy". The following information was reported: IMMUNISATION (non-serious) with onset 20Dec2021 13:15, outcome "unknown", described as "booster"; VACCINATION SITE ERYTHEMA (non-serious) with onset 20Dec2021, outcome "recovering", described as "had a bright red strawberry colored". The event "had a bright red strawberry colored" was evaluated at the physician office visit.  Additional information: Caller says she does not have an emergency question it was just question of curiosity. She had the Pfizer booster shot 16 days ago and she still has a big red circle and it is about the size of the palm of a woman's hand and she was curious if that was normal. It doesn't hurt and she has not been sick. She was wondering if people who have gotten this have it for a very long time? Product clarified to be the Pfizer COVID vaccine. It started on the day that she got the shot and then it grew and became bright red. Since it grew they measured it just in case things went wrong. They put a ruler there and took a photo in case things went downhill health wise, but they didn't go downhill. She didn't get sick, she didn't throw up, she didn't have a headache and she didn't have any bad reactions. She has lots of allergies and that's why she was concerned. It got bright red, like strawberry red, and she said oh jeez was there anything that she should be worried about and her husband, who has no medical background, said that they could just watch it because people have reactions to these types of things. They just watched it and it had began to fade and fade. She then went to the doctor's office and the doctor said wow, they really bruised her. She asked her husband if it looked like a bruise and they don't think that it looks like one, but they have no medical background. It was not bruised, there was no purple, green, blue or anything like that. It was red and has been fading and fading and she thought my goodness it has been 16 days, she has not been sick but her question is do a lot of people last 16 or 21 days with this slowly fading away? It was visible and if she were out in public in a sleeveless shirt people would say what's that big red mark on her arm? She thought to call and ask if this was common to everyone or common to people who have more sensitive skin and allergies and sensitivities to chemicals and lots of things like spandex, latex and that kind of stuff. She thought she could ask. She had her booster dose of the Pfizer COVID vaccine on 20Dec2021 at 1:15 in the afternoon.   No follow-up attempts are possible. No further information is expected.