It's whole thing is pretty upsetting; I developed the blood clot in my leg, I still have it; She said you got deep vein thrombosis; When I got out of bed my leg hurt; There was a big knot on my leg and it was on my calf on my right calf kind of on the inside of my calf, mid-calf; It hurt but it all hot and red; It hurt but it all hot and red; I did have Thrombosis but it wasn't deep vein, it was a superficial thrombosis; This is a spontaneous report from a contactable consumer (Patient). A 65-year-old patient of an unspecified gender received bnt162b2 (PFIZER-BIONTECH COVID-19 MRNA VACCINE, Formulation: Solution for injection Batch/lot number: EL9265; Expiration Date: May2021) via an unspecified route of administration in arm left on 09Mar2021 05:00 as dose 2, single for COVID-19 immunization. Medical history included gastrooesophageal reflux disease from an unknown date and unknown if ongoing, blood pressure measurement from an unknown date and unknown if ongoing. Concomitant medications included alprazolam (AZOR [ALPRAZOLAM]) taken for blood pressure measurement, (for 10 years) start and stop date were not reported. Historical vaccine includes bnt162b2 (first dose lot number: EL9267) on 15Feb2021 for COVID-19 immunisation. Patient reported that, 36 hours after I had the second vaccine, I developed the blood clot in my leg, I still have it. I have been on blood thinner for been almost 3 months now and it's still there, it had not gone away but I need you guys to know this because I think more people are getting blood clots and I think you guys need to be warning people about that. On 11Mar2021, 07:00 Thursday morning patient experienced and when I got out of bed my leg hurt and I sat down there, there was a big knot on my leg and it was on my calf on my right calf kind of on the inside of my calf, mid-calf. On the internet it was deep vein thrombosis but otherwise I felt fine, other than this knot on my leg that did hurt. It hurt a few touches, you know my calf rubbed against my leg it hurts that sort of thing. My bed is high so I when I had to get into bed, and I had to put pressure on that leg it would hurt that sort of a thing so by the time of the weekend it started to get very red and hot. On 15Mar2021, I called my doctor's office they couldn't get me in so I called another doctor's office that I had gone multiple times to get COVID testing, when I was exposed and all my COVID test came back negative but I did suspect that I had COVID back in very early on March2020, appointment at 04:20 in the afternoon so I went to the urgent care that was associated with my doctor's office and as soon as the nurse practitioner saw my leg she said you got deep vein thrombosis you have to go to emergency room they took a, ultrasound of my leg and they confirm that I did have Thrombosis but it was not deep vein, it was a superficial thrombosis. When probed for height and weight, patient reported that I weigh about 210 pounds. I take Nexium not every day about 3 times a week as per doctor's recommendation because he said it is not good for me but I do have GERD. Both shots of vaccine were given in left arm. On an unspecified date, the patient felt the whole thing is pretty upsetting.The patient underwent lab tests and procedures which included covid-19 resulted as negative on Mar2020. The clinical outcome of all the events was unknown.  Follow attempts are needed; Additional information has been requested.