ITP; petechiae; On the 12Jul2022 a blood test (CBC) was done, and the results revealed 6K of platelets.; on Jun 25thshe presented a hematoma on her left leg, on the 02Jul2022 she presented a hematoma on her right arm; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  An 11-year-old female patient (not pregnant) received BNT162b2 (BNT162B2), on 01Jun2022 at 13:00 as dose 3 (booster), single (Lot number: FL8094) at the age of 11 years, in left arm for covid-19 immunisation. The patient had no relevant medical history. There were no concomitant medications. Vaccination history included: BNT162b2 (Dose Number: 2, Batch/Lot No: FK5618, Location of injection: Arm Left, Vaccine Administration Time: 01:00 PM), administration date: 04Dec2021, when the patient was 10-year-old, for COVID-19 immunization; BNT162b2 (Dose Number: 1, Batch/Lot No: FK5618, Location of injection: Arm Left, Vaccine Administration Time: 01:00 PM), administration date: 13Nov2021, when the patient was 10-year-old, for COVID-19 immunization. The following information was reported: IMMUNE THROMBOCYTOPENIA (hospitalization) with onset 09Jun2022 at 17:00, outcome "not recovered", described as "ITP"; PETECHIAE (hospitalization) with onset 09Jun2022 at 17:00, outcome "not recovered"; HAEMATOMA (non-serious) with onset 25Jun2022, outcome "not recovered", described as "on Jun 25thshe presented a hematoma on her left leg, on the 02Jul2022 she presented a hematoma on her right arm"; PLATELET COUNT ABNORMAL (non-serious) with onset 12Jul2022, outcome "not recovered", described as "On the 12Jul2022 a blood test (CBC) was done, and the results revealed 6K of platelets.". The patient was hospitalized for immune thrombocytopenia, petechiae (hospitalization duration: 4 day(s)). The events "itp", "petechiae", "on jun 25thshe presented a hematoma on her left leg, on the 02jul2022 she presented a hematoma on her right arm" and "on the 12jul2022 a blood test (cbc) was done, and the results revealed 6k of platelets." required physician office visit and emergency room visit. The patient underwent the following laboratory tests and procedures: Full blood count: (12Jul2022) revealed 6K of platelets. Therapeutic measures were taken as a result of immune thrombocytopenia, petechiae, haematoma, platelet count abnormal and patient was treated with gammaglobulina.  Additional information: Patient had no known allergies. The patient did not receive any other vaccines within 4 weeks prior to the COVID vaccine. The patient did not receive any other medications within 2 weeks of vaccination. Prior to vaccination, the patient was not diagnosed with COVID-19. Since the vaccination, the patient had not been tested for COVID-19. After the third vaccine she presented petechiae in the skin on the 8th day (09Jun2022), on 25Jun she presented a hematoma on her left leg, on the 02Jul2022 she presented a hematoma on her right arm, on the 10Jul22 she presented petechiae on her right leg and under her right arm. On the 12Jul2022 a blood test (CBC) was done, and the results revealed 6K of platelets. She was taken to the emergency room for treatment. The patient didn't have any past illnesses before the event, just the Pfizer vaccine for Covid (third dose), Now she was diagnosed with ITP and medically supervised.  Follow-up (01Sep2022): Follow-up attempts are completed. No further information is expected.