Whole leg had blood clots from top to bottom; Pain in leg; This is a spontaneous report from a contactable consumer (patient).   A 60-year-old male patient received second dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE; Lot Number: EW0161), via an unspecified route of administration in Arm Right on 20Apr2021 (at 60 years)as single dose for covid-19 immunisation. Medical history included blood pressure abnormal. Concomitant medication included acetylsalicylic acid (ASPIRIN) and nebivolol hydrochloride (BYSTOLIC), for blood pressure abnormal.  Previously on 30Mar2021 (at the age of 60 years) the patient received first  dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE;  lot ER8733)  for covid-19 immunisation. On 22May2021 patient experienced pain in leg and on 04Jun2021 whole leg had blood clots from top to bottom. The patient reported what he believed was a side effect from the vaccine and clinical course was described as follows: The patient's whole leg had blood clots from top to bottom after the second vaccine, he had never had this before. The patient had been healthy all his life and never had this. Patient was really well built and most of his weight comes from muscle. About a month after the vaccine the patient had his very first huge pain, and he thought he could walk it off but it didn't go away. The patient thought it would be inflammation in the muscle but it was a blood clot.The pain started around 22May2021 and the patient saw the doctor for the first time 10 days later which was around 04Jun2021. This was all in the patient's right leg the whole leg. Basically the blood clot was going from 2 cm from main artery going down to almost his ankle. The blood clot was in a superficial vein not a deep vein. Pain in leg was reported as worsened and it could be felt where the vein was, it could be seen the big red area going on the whole side of the leg where the vein was on the inside kind of. It was hard like a rock. It could be felt the vein like a metal rock.The patient went right away to a vascular doctor, his cardiologist knew about this because it was so severe. The patient had seen two different vascular doctors for this problem. Withheld has been treating the patient for 3 months and was considering using for surgery to close the vein, but the patient wanted to get a second opinion. The patient's cardiologist said not to rush into surgery. The veins were still clogged and there were still blockages the cardiologist said to wait. The patient saw the second doctor and stayed with him.  Tests were done with the doctors, it was twice a month for the first month which started on 04Jun2021 or 05Jun2021 and then once a month since then. The last three months they were every month. They told the patient that it was right on the borderline of having to hospitalize him because it was 2 cm. The patient tried at first with the blood thinners and it still didn't clear. He has been taking Xarelto (Lot 20LG4206; expiration date Sep2023). The patient believed that he got this because of the vaccination. The caller went through maybe 5 times, he had am SG done on his leg (as reported) and every time the technician said they "have a lot of that" and they believe it was from the vaccine. Final outcome of Pain in leg was not recovered; outcome of leg had blood clots was unknown.; Sender's Comments: Linked Report(s) : US-PFIZER INC-202101260324 Duplicate case