Light headedness; having tension in right side of head and neck, it lasts worse; she is also been having a little bit of tension in her head the right side of her head and it lasts worse if she lays down or if she moves her head.; tension on the right side of neck; Pain in left arm where got vaccine; Brain Fog; Felt cold but not entirely a fever and felt like a little bit weird; 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.  A 28 year-old female patient received bnt162b2 (BNT162B2), administered in arm left, administration date 29Apr2021 (Batch/Lot number: unknown) as dose 1, single for covid-19 immunisation. The patient's relevant medical history and concomitant medications were not reported.  The following information was reported: VACCINATION SITE PAIN (non-serious) with onset Apr2021, outcome "recovered" (01May2021), described as "Pain in left arm where got vaccine"; FEELING ABNORMAL (non-serious) with onset Apr2021, outcome "recovered" (May2021), described as "Brain Fog"; FEELING COLD (non-serious) with onset Apr2021, outcome "recovered" (May2021), described as "Felt cold but not entirely a fever and felt like a little bit weird"; DIZZINESS (non-serious) with onset May2021, outcome "unknown", described as "Light headedness; having tension in right side of head and neck, it lasts worse"; TENSION HEADACHE (non-serious) with onset May2021, outcome "unknown", described as "she is also been having a little bit of tension in her head the right side of her head and it lasts worse if she lays down or if she moves her head."; NECK PAIN (non-serious) with onset May2021, outcome "unknown", described as "tension on the right side of neck". Therapeutic measures were not taken as a result of vaccination site pain, feeling abnormal, feeling cold, dizziness, tension headache, neck pain.  Additional information: The patient received the first dose of Pfizer Covid-19 vaccine on 29Apr2021, after the vaccine she had regular side effects, like little pain in her left arm where the vaccine was given, a little bit of Brain fog but no nausea. She had no fever but did feel cold. Now since last Sunday she felt that she was having light headedness all day every day and it was constant, it was not coming and going and she was also been having a little bit of tension in her head the right side of her head and it lasted worse if she laid down or if she moved her head. When paraphrased the concern, consumer stated that right after the vaccine on 29th or 30th, she just got a little bit but she had a pain in her left arm where she got the vaccine shot and then she did not get the fever, she felt cold but not entirely a fever and felt like a little bit weird like under medication (Covid-19 vaccine) and then on Saturday this 01May, she was doing better and she was doing normal. Till Sunday she was doing normal but then Sunday night she got like a tension under right side of the head at first got light headed in the afternoon and with light headed she was like ok. It must be a side effect of common vaccine, it had been three days, so she got a tension in the right side of head but really like mild and then the patient sat down and from then it passed away like for 30 minutes and then it was tension on the right side of neck. She felt like being Light headed and felt this side effect and did not for 1 week, it was not for one time it was for every morning every day. She was trying to call today if someone could say that there were any other reports saying these effects were normal that was what she was trying to find out.   No follow-up attempts are possible; information about lot/batch number cannot be obtained. No further information is expected.