Patient had some sore arm the day of the vaccine; After the vaccine she had a dime size bleeding at the injection side.; Caller stated with the bleeding and using 1 inch needle to inject the vaccine its possible that vaccine leaked out.; This is a spontaneous report from a contactable consumer or other non hcp (parent). A 29-years-old female patient received bnt162b2 (PFIZER-BIONTECH COVID-19 mRNA vaccine, Solution for injection), dose 2 via an unspecified route of administration, administered in arm on 14May2021 16:30 (Batch/Lot number: unknown; Expiry date: unknown) (at the age of 29-years-old) as dose 2, single for covid-19 immunisation. The patient medical history included hashimotos from an unknown date in 2010 and ongoing and patient had a weight of 220 pounds from an unknown date. The patient concomitant medication(s) included levothyroxine sodium (SYNTHROID) taken for hashimotos, start and stop date were not reported. The patient did not receive any other vaccines within 4 weeks prior to the covid 19 vaccine. The patient had previously received the first dose of bnt162b2 (PFIZER-BIONTECH COVID-19 mRNA vaccine, Solution for injection), dose 1 via an unspecified route of administration, administered in left arm on an unknown date (Batch/Lot Number: unknown) as dose 1, single for covid-19 immunization, at the same place with the same person. Stated that she received the first one three weeks prior on a 23Apr2021. On 14May2021, the patient stated that they used a one inch needle rather than a 1.5 inch which she believes her weight indicated larger needle use on 14May202116:30. Stated that she was told that they use a one-inch needle for everyone regardless of age or weight. Stated that she was bleeding after the vaccine and there was dime to nickels worth of blood on cotton ball on 14May2021 16:30. Stated that she had no symptoms other than a sore arm on the following day on15May2021. Wanted to know if with the bleeding and possible symptoms that the vaccine did not get in the muscle or the vaccine leaked out with the needle, if she should antibody test. Stated that she is a high-risk individual because of her BMI and autoimmune disease. Wanted to know the protocol for needle length. Wanted to know with the amount of bleeding described if it is possible that the vaccine leaked out. Stated that she read online that there are various antibody tests and she wanted to know if they would recommend an antibody test and the best doctor to follow it. Stated that she had Hashimoto's and her weight was 220 prior to the vaccine. The patient stated that the bleeding started immediately and stopped quickly. Stated that there was no blood in the vaccine. The patient not visited emergency room or physician office. There was a product complaint reported. The outcome of the event Vaccination site bleeding and Pain in arm was recovered on May2021 and for the remaining event was unknown.  Description of complaint: Covid vaccine: Questioning with the bleeding and possible symptoms that the vaccine did not get in the muscle or the vaccine leaked out with the needle, if she should antibody test.   This follow-up is being submitted to notify that the lot/batch number is not available despite the follow-up attempts made. Follow-up attempts completed. No further information is expected.