Every time I got this Pfizer vaccine, the entire arm and its lifting capacity is reduced to basically nothing, 15 pounds of my arm fully extended is heavy 25 pounds straight up and down was heavy; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A patient (no qualifiers provided) received BNT162b2 (BNT162B2), as dose number unknown, single (Batch/Lot number: unknown) for covid-19 immunisation. The patient's relevant medical history and concomitant medications were not reported. The following information was reported: LIMB DISCOMFORT (non-serious), outcome "unknown", described as "Every time I got this Pfizer vaccine, the entire arm and its lifting capacity is reduced to basically nothing, 15 pounds of my arm fully extended is heavy 25 pounds straight up and down was heavy".  Additional information: Consumer stated, "I was wondering if Pfizer had figured up the source, What I reported back in 2021(Further not clarified hence, captured as initial report) in non-scientific terms of course known as Youssef's Arm Syndrome (Event captured conservatively) for reference point I am 6 foot 3 inches tall(Captured as provided) I weigh 260 pounds (Captured as provided) now I can lift a lot of weight I can lift nearly 45 pounds of my arms fully extended, excuse me, As in you take your arm in, 'stick it out its part' I can lift 45 pounds like that, I can lift roughly half of my body mass straight up and down. after I got, well I am getting into that I am just trying to point put things in the perspective here because for lot of people this would be, for lot of people this wouldn't be true because this is 'having regard those'. Every time I got this Pfizer vaccine, the arm went got it, the entire arm and its lifting capacity is reduced to basically nothing as in its 15 pounds of my arm fully extended is heavy 25 pounds straight up and down was heavy what is the source of Youssef's arm syndrome? explained medically of course, I have my theory what is going on I am not a doctor but I have a theory as to what is going on but I don't know for sure and no body explained this to me and here is the bigger problem when I go to the website that tracks all of the side effects for the Pfizer for all the different vaccines there is over 50 thousands of pages of result. 50 thousand pages once I checked the twenty theory may be there is 20 thousand pages. But the point it's over the 5000 pages were the just side effect. Sure you wanted this time that's what the problem, I am not going to 20000 pages with the garbage thing and explanation. When paraphrased Vaccine name as Pfizer COVID-19 Vaccine and informed about the Pfizer Medical information department for the concern: Consumer stated, "I just wanted to know what causes this?. In respond: Consumer stated, "Okay, thank you, I am gonna call now, have a good day, have a good one. Further probing could not be done as consumer hung up abruptly. Hence, product details (LOT#, expiration date, NDC# and UPC #), purchase details and other details were unknown and limited information was available over the call. QR Comment: Reporter type was not available over the call, hence reporter type was captured as consumer or non-healthcare professional by default.  The information on the batch/lot number for BNT162b2 has been requested and will be submitted if and when received.