I got a Booster shot on last Friday; it started itching and itch for Friday, Saturday, Sunday/My arm itched for several days; Sunday evening it started swelling up; swollen from my shoulder down half way to my elbow and my arm never hurt/My arm started swelling up from my shoulder to halfway day down to my elbow; where the shot was given I have a black spot that''s about the size of your finger nail, your large finger your thumb/Injection site turned black it wasn't red half an inch round circle; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP) from medical information team. The reporter is the patient. Other Case identifier(s): US-PFIZER INC-202101594031, US-PFIZER INC-202101572923.  A 77 year-old female patient received bnt162b2 (BNT162B2), intramuscular, administered in arm left, administration date 05Nov2021 10:15 (Lot number: FF2588) at the age of 77 years as dose 3 (booster), single for covid-19 immunisation. Relevant medical history included: "Asthma" (unspecified if ongoing); "Bronchitis" (unspecified if ongoing); "COPD" (unspecified if ongoing); "Overweight" (unspecified if ongoing); "Sleep apnea" (unspecified if ongoing); "Hypertension" (unspecified if ongoing); "Diabetes type II" (unspecified if ongoing); "AFib" (unspecified if ongoing); "Chronic Blood Clotting: Thrombosis" (unspecified if ongoing); "Double Pneumonia" (unspecified if ongoing). The patient took concomitant medications. Vaccination history included: Bnt162b2 (Dose: 1st Dose, Pfizer, LOT: EN6202, NDC/EXP: Unknown , Curious because she got the first two doses at Hospital), for COVID-19 immunization, reaction(s): "I had no reaction"; Bnt162b2 (Dose: 2nd Dose, Pfizer, LOT: Needs a magnifying glass to read the lot number. Is going to guess at it. Initially states it's EM, then either an 8 or a 6, followed by 0202, Attempted to clarify lot. Caller then responds saying she believes the lot number is the same as the first dose: EN6202, NDC/EXP: Unknown , Curious because she got the first two doses at Hospital), for COVID-19 immunization, reaction(s): "I had no reaction". The following information was reported: IMMUNISATION (non-serious) with onset 05Nov2021, outcome "unknown", described as "I got a Booster shot on last Friday"; PRURITUS (non-serious) with onset 2021, outcome "unknown", described as "it started itching and itch for Friday, Saturday, Sunday/My arm itched for several days"; PERIPHERAL SWELLING (non-serious) with onset 2021, outcome "unknown", described as "Sunday evening it started swelling up; swollen from my shoulder down half way to my elbow and my arm never hurt/My arm started swelling up from my shoulder to halfway day down to my elbow"; VACCINATION SITE DISCOLOURATION (non-serious) with onset 2021, outcome "unknown", described as "where the shot was given I have a black spot that''s about the size of your finger nail, your large finger your thumb/Injection site turned black it wasn't red half an inch round circle". Relevant laboratory tests and procedures are available in the appropriate section. Therapeutic measures were not taken as a result of pruritus, peripheral swelling, vaccination site discolouration.  Additional information: Consumer stated, "I got a Booster shot on last Friday. I had no reaction to the first two shot. My arm didn't swell, it didn't itch, it didn't hurt, nothing "but it was with the Booster(Covid-19 Vaccine), I mean my arm wasn't sore or anything but itches."For 3 days, on Monday she experienced shoulder swelling half way down. She stated, "Where I got my shot I have a nice black spot the size of my fingernail. it's not a node it is just a swollen; it wasn't been red but it was black while I got upset. My pharmacist told me it's the first time he saw a reaction like that. It was itching but no pain. I wanna know if that is normal. " Caller wanted to see if these were reported side effects from the Pfizer covid vaccine booster dose. The pharmacist told me the first 2 shots and the booster; there is no difference in the amount. Patient was asking I only heard once or twice on TV people with health problems like me may need a 4th shot. Is there any information on that. She had no fever. She has A-fib. Has to keep her blood pressure for two weeks before going back to the doctor. It was all normal. Her sugar level was fine. Everything was fine. Clarified it is not a bruise. It is a black spot. Has a doctor's appointment. Patient was asking If the doses were two weeks apart, would it be the same lot number. She can't believe it would be the same lot number. Caller initially states Pfizer 0.3mg syringe. Clarified units of measurement with caller. Card reads 0.3ml syringe." Consumer stated, "I take approximately 25 different prescription.  No follow-up attempts possible. No further information expected.