Threw up; sore throat; coughing; nausea; headaches; the patient's headaches and nausea and stomach aches worsened; Stomach aches; This is a spontaneous report from a contactable consumer (patient's father) via medical information team. A 12-year-old female patient received bnt162b2 (COMIRNATY, Solution for injection, Batch/Lot Number: 30130BA, Expiration date: Unknown), via an unspecified route, administered in arm left (reported as left shoulder) on 17Sep2021 at 03:00 PM (age at vaccination was 12 years) as DOSE 1, 0.3 ML SINGLE for covid-19 immunization at a local pharmacy. Vaccine was not administered at a facility. No Additional vaccines administered on same date of Pfizer suspect was reported. No history of all previous immunization with the Pfizer vaccine considered as suspect. Medical history included ongoing ADHD (attention deficit hyperactivity disorder) (Diagnosed about 4.5-5 years ago), ongoing anxiety (Diagnosed about 4.5-5 years ago, this is part of the ADHD, nausea from an unknown date and unknown if ongoing, stomach pain from an unknown date and unknown if ongoing, concussion from Aug2021 to an unknown date (patient had the concussion in Aug2021), daily headaches from an unknown date and unknown if ongoing. Ongoing Allergies included weather related allergies, allergies to things like sun blocks, her skin is very sensitive to perfumes and lotions where she will get hives, but they have not gotten the specific allergies diagnosed. Patient has had these allergies her whole life, they are ongoing. Family medical history included diabetes in family. Concomitant medications included methylphenidate hydrochloride (CONCERTA) taken for ADHD (attention deficit hyperactivity disorder), start and stop date were not reported (Been on it for about 2-3 years); sertraline hydrochloride (ZOLOFT), taken for anxiety from an unspecified date in 2021 (Around Jun2021or Jul2021) to an unspecified date. Prior vaccination within 4 weeks included flu vaccine (injection given in her shoulder) and had her school vaccinations. On an unspecified date in Sep2021, the patient experienced sore throat, coughing, nausea had to come home from school twice. Sore throat and coughing started of about at least 7 days after the Pfizer Covid-19 Vaccine, very hoarse like cough. Reporter wondered if this sore throat and coughing might be making the other adverse events worse. She also had headaches on an unknown date in Sep2021, and was being treated for a concussion that happened in Aug2021. The patient's mother was the one who took the patient to get the Pfizer Covid-19 Vaccine and did not notify the administering pharmacist that the patient had the concussion in Aug2021. The patient's headaches in the afternoon were pretty bad and she complained more often than before and they were worsening. After having been administered the Pfizer Covid-19 Vaccine, the patient's headaches and nausea and stomach aches worsened on an unknown date in Sep2021. The patient had to come home from school early on 20Sep2021 because of nausea and stomach ache, and was seen by her traumatic brain injury doctor that date. That is the doctor who is seeing her for her concussion. On 22Sep2021 night, the patient threw up. The adverse events resulted in visit to physician office. No investigation assessment was reported. The patient has had no testing or treatment relative to these events. None of relevant tests were done. The reporter want to know if they are side effects and it was reported that regarding reported side effects, nausea and headaches and time and duration of systemic side effects. Explained that sore throat and cough were not reported side effects, explained that these may not be all of the reported side effects that have been reported. A review of the Pfizer BioNTech covid 19 vaccine Prescribing Information did not find information about a potential interaction, or interaction study, or administration in individuals with a history of concussions.This may not have been studied. And it was advised to consult patient doctor for further guidance as Pfizer is unable to assess causality or provide recommendations. Outcome of the events was not recovered; event threw up was recovered on 22Sep2021.