both sides of her neck it was hard to turn her head left or right/stiff neck; neck is so sore; tight muscles in your neck/diagnosed with bilateral trapezius muscle tightness; may have had a teeny weeny sore throat, it was hard to tell; tired; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP) from medical information team. The reporter is the patient. Other Case identifier(s): US-PFIZER INC-2021376727 (Pfizer).  A 63 year-old female patient received bnt162b2 (BNT162B2), administration date 26Mar2021 (Batch/Lot number: unknown) as dose number unknown, single for covid-19 immunisation. The patient's relevant medical history and concomitant medications were not reported. The following information was reported: FATIGUE (non-serious) with onset 2021, outcome "unknown", described as "tired"; MUSCULOSKELETAL STIFFNESS (non-serious) with onset Mar2021, outcome "unknown", described as "both sides of her neck it was hard to turn her head left or right/stiff neck"; OROPHARYNGEAL PAIN (non-serious) with onset 2021, outcome "unknown", described as "may have had a teeny weeny sore throat, it was hard to tell"; NECK PAIN (non-serious) with onset Mar2021, outcome "unknown", described as "neck is so sore"; MUSCLE TIGHTNESS (non-serious) with onset Mar2021, outcome "unknown", described as "tight muscles in your neck/diagnosed with bilateral trapezius muscle tightness". The events "tired", "both sides of her neck it was hard to turn her head left or right/stiff neck", "may have had a teeny weeny sore throat, it was hard to tell", "neck is so sore" and "tight muscles in your neck/diagnosed with bilateral trapezius muscle tightness" were evaluated at the physician office visit. Relevant laboratory tests and procedures are available in the appropriate section. Therapeutic measures were taken as a result of fatigue, musculoskeletal stiffness, oropharyngeal pain, neck pain, muscle tightness. Clinical course: Caller states she got the Pfizer vaccine 26Mar2021 and was tired and had the typical mild side effects and as time went on by Monday both sides of her neck it was hard to turn her head left or right. States she waited until 31Mar2021 and went in and saw a Nurse Practitioner at Medical Associate in and was told there were no enlarged lymph nodes. States in Feb2021 she had strep throat, that was Feb 20 something and she thought maybe she had lingering strep as she may have had a teeny weeny sore throat, it was hard to tell. States she watches her grand children and they had strep also. States the strep test was negative. States that is why she had gone in was to check for strep. Caller states her neck is so sore and is wondering if it is from lifting but states she is lifting all the time and this is new and could it be a side effect from the Pfizer vaccine. States her healthcare provider told her she could take Advil, but caller states there has been controversy with taking Advil and Tylenol. Caller states she took 2 Advil and the healthcare provider recommended a massage and taking Advil and using heat and she did use heat. Caller states it is not that much better and it still hurts to turn her head left or right. States her healthcare provider called it bilateral trapezius muscle tight and painful to palpation and massage. Caller states the healthcare professional said woah you have really tight muscles in your neck and was told this could be a side effect.  No follow-up attempts are possible; information about lot/batch number cannot be obtained. No further information is expected.