I mean I cannot even stand up; Extreme Vertigo; Dizziness; Left jaw and my left neck are stiff# bad stiffness, like muscle soreness# I thought may be like I tore the muscle on my neck; Left jaw and my left neck are stiff# bad stiffness, like muscle soreness# I thought may be like I tore the muscle on my neck; Left jaw and my left neck are stiff# bad stiffness, like muscle soreness# I thought may be like I tore the muscle on my neck; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A 39 year-old female patient received bnt162b2 (BNT162B2), administered in arm left, administration date 31Mar2021 (Batch/Lot number: unknown) at the age of 39 years as dose 1, single for covid-19 immunisation. The patient had no relevant medical history. There were no concomitant medications. The following information was reported: JOINT STIFFNESS (non-serious), MUSCULOSKELETAL STIFFNESS (non-serious), MYALGIA (non-serious) all with onset 01Apr2021, outcome "not recovered" and all described as "Left jaw and my left neck are stiff# bad stiffness, like muscle soreness# I thought may be like I tore the muscle on my neck"; VERTIGO (non-serious) with onset 05Apr2021, outcome "not recovered", described as "Extreme Vertigo"; DIZZINESS (non-serious) with onset 05Apr2021, outcome "not recovered", described as "Dizziness"; DYSSTASIA (non-serious), outcome "unknown", described as "I mean I cannot even stand up". Therapeutic measures were not taken as a result of joint stiffness, musculoskeletal stiffness, myalgia, vertigo, dizziness, dysstasia.  Additional information: The consumer stated that I received my first Pfizer dosage 31Mar2021. 01Apr2021 I had a very stiff neck that following 3 days I just have a really really stiff neck and 05Apr2021 I woke up with extreme vertigo and dizziness and it has been persistent since, like very intense and my left jaw and my left neck are stiff." Consumer was informed about the Medical Information Department for the concern and was provided with the contact# for Pfizer Medical Information as #, Option 3, and was informed that the department is open from Monday to Friday, from 8 am to 8 pm and 9 am to 3 pm on Saturday and Sunday. Also, was told about the website for further information. When probed for the mailing address, consumer stated, "No." When probed for the #LOT, consumer stated, "I cannot tell if it is an E or a G. I think it is a G, GR8730." Consumer confirmed it was the first dose. When probed for the Expiration, #NDC and #UPC, consumer stated, " The expiration? It just says 31Mar2021. There is no expiration." Event start date: Name (Withheld) stated, "Yes, I got the shot on 31Mar2021 and next day like 01Apr2021, I got bad stiffness, like muscle soreness. I thought may be like I tore the muscle on my neck and then after a couple of days 05Apr2021, the dizziness started and its progressively getting worse like debilitating." (Year not clarified. Hence, not captured in tab. When probed for the site of vaccination, consumer stated, "Left arm." When probed for the Lab. Test, (withheld) stated, "I have not yet. The reason I am calling for is the guidance on what to do. Am I supposed to go emergency room? I am supposed to have a another shot next week and there is no way if its goanna do anything like this. I mean I cannot even stand up." When probed for the condition is worsened, consumer stated, "It is worsened over time." Treatment: Consumer stated, "No, just water bottle."  No follow-up attempts are possible; information about lot/batch number cannot be obtained. No further information is expected.