This is a spontaneous report from a contactable consumer (patient himself). A male patient of an unspecified age received second dose of BNT162B2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE, Formulation: Solution for injection, Lot number: EN1699, Expiration date: 15Mar2021), via an unspecified route of administration in left arm on an unspecified date as a single dose for COVID-19 immunization. The patient's medical history included high blood pressure, football injury to his knee. Concomitant medication included unspecified medications. Patient stated, "yeah, he take the lowest dose for something for high blood pressure". The patient previously received first dose of BNT162B2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE, Formulation: Solution for injection, Batch/lot number: EN6198), via an unspecified route of administration on an unspecified date as a single dose for COVID-19 immunization. No other vaccine (4 weeks prior). It was reported that, it's been couple of months since he had his second injection. Patient have his card with the numbers but 2 weeks after the second injection, he had like muscle cramps in his entire leg for like two weeks, it was like an internal withheld has waken up and it would not go away. Patient could find overly until he actually discovered a position that would satisfy whatever that strange thing it was, it felt like his leg was swollen but there was no visible swelling. The tension on his skin was numb like he have been kicked in the shins, nothing was swollen but it felt numb. Patient bent over and touched his toes and the flats of his palms of his hand on the floor. Patient got into resistance and that pain went away but for 2 weeks patient consumed about two thirds of a bottle of the Tylenol (treatment) and patient talk to a lot of customers who, he have been back to work now from a month, everything was opening up and they have complaint the worst or similar side effects (further information unavailable) and that's what make him say that may be it was worth giving you guys a call just to let you know to know he thought, he should not go to the hospital for this. That was the only alternative to give call on withheld but still he said Jesus, feels like he ripped his aorta which was bad (further not clarified. Hence, not captured in tab) and he says withheld, and it didn't go away. It wasn't just isolated to his knee which he had a football injury when he was in high school to his knee and when the weather was bad his knee hurts and he figured that's what it was, it started out like that and it progressed to something and went, and it was lot more difficult to manage. Patient just want to pass it along for what's it worth, so you guys have the information. Still experiencing: Patient stated, "no, it's gone, it's gone since the first week of May2021, but patient would like to tell that he was going to tell you about he had no strength in legs. Patient was telling you about, he had no strength in it. Patient almost walked down the stairs he was like Holy Jesus, it was better but it's still not where it used to be in terms of the strength in the right leg. Patient still act like he was mad lymph, but he could feel like little relaxation and it's getting better, but he don't think it's permanent thing. Patient dread the idea of the booster." Patient stated, "Tylenol 500 mg, no more than 6 a day but they helped. Patient would say that they helped but not enough." No investigation assessment. The patient was treated with Tylenol 500 mg for pain, when the weather was bad his knee hurts, it progressed to something. The outcome of the event "had no strength in legs/ it was better but it's still not where it used to be in terms of the strength in the right leg" was recovering and unknown for the other events. Follow-up are needed. Information on the lot/batch number has been requested.