the right knee has been bothering him since the shot; in between his thighs and outside down to his knees he had big red welts like strawberries, they didn't itch but they are a nice brightish red color, also on his hips; right knee is bothering him, he has arthritis in it; fatigued; in between his thighs and outside down to his knees he had big red welts like strawberries, they didn't itch but they are a nice brightish red color, also on his hips; This is a spontaneous report from a contactable consumer (patient himself) and other HCP. A 85-year-old male patient received second dose of bnt162b2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE; Solution for injection; Batch/Lot number: EN6206, Expiry date was not reported), via an unspecified route of administration, administered in arm left on 20Mar2021 at 14:44 (at the age of 85-year-old) as dose 2, single for COVID-19 immunization. The patient medical history included ongoing high blood pressure, ongoing enlarged prostate, Knee arthroplasty from 03Nov2020 to 03Nov2020 (left knee replacement, the right knee has been bothering him since the shot on 03Nov2020). The patient had no family medical history relevant to adverse event. The patient concomitant medications included hydrochlorothiazide at a dose of 25mg once a day via oral route taken for high blood pressure, start and stop date were not reported and has been taking it for quite a while, quite a few years; atenolol at a dose of 25mg once a day via oral route taken for high blood pressure, start and stop date were not reported, unspecified prostate pill on an unspecified date and stop date were not reported and taking since he had an enlarged prostate, quite a few years, he thinks the medication is called Flomax, then started to state a medication with a T, Captured as unspecified prostate pill. The patient previously took first dose of bnt162b2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE; Solution for injection; Batch/Lot number: EN6203, Expiry date was not reported), via an unspecified route of administration on 20Feb2021 (at the age of 85-year-old) as dose 1, single for COVID-19 immunization. The patient had a vaccination, the last one was on the 20Mar2021 and has noticed since he's had the vaccination that in between his thighs and outside down to his knees he had big red welts like strawberries, they didn't itch but they are a nice brightish red colour, also on his hips on an unspecified date in Mar2021. He said he had knee replacement surgery in November and his right knee is bothering him, he has arthritis in it on an unspecified date in Mar2021, it feels like it was bone-to-bone for about a week. He says he doesn't think he had any nauseation. On the hips, side of hips, across the hips towards the back, both legs, welts have been going on for 4 or 5 days, maybe started Friday, he kept feeling something and he saw little red spots, nice big reddish like a tomato, or strawberry red this was 25Mar2021 or 26Mar2021, it has been the same basically until last night he put some lotion on and it kind of calmed down with the anti-Itch lotion. He has been fatigued ever since he had the shot on an unspecified date in Mar2021, he is not fatigued to the point that he is not up to like he has been. He says he is thinking about going, but he'd be there all night. He says first dose professional Clinic Site he confirms he did not go to the ER. The patient underwent lab tests and procedures which included weight: 155 pounds on probably about 155 pounds. The patient did not receive any other vaccines within four weeks prior to the vaccination. Prior to the vaccination, the patient was not diagnosed with COVID-19. The patient received anti-Itch lotion as treatment for the events red spotty rash, welts. The clinical outcome of all the events was unknown.  No follow-up attempts are possible. No further information is expected.