stomach discomfort; feels like he has a lot of gas; stomach got inflamed; bad stomach issues; This is a spontaneous report from a contactable consumer (patient). A 23-year-old male patient received bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE, solution for injection, Lot number was not reported, Expiry Date: Unknown), dose 2 via an unspecified route of administration, administered in the left upper arm on 03Aug2021 at 18:30 (at the age of 23 years old) as dose 2, single for COVID-19 immunisation at pharmacy/drug store. No PQC was present. No investigation assessment was reported. No additional vaccines administered on same date of the pfizer suspect. Medical history included anxiety from unspecified date and unknown if was ongoing. Concomitant medication(s) included Bystolic taken 2.5mg once a day for anxiety, start and stop date was not reported and has been taking for maybe 8 or 9months. The patient previously took bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE, solution for injection, Lot number was not reported), dose 1 via an unspecified route of administration, administered in the left upper arm on Apr2021 (at the age of 23 years old) as dose 1, single for COVID-19 immunisation and experienced bad headache and nervousness. No illness at time of vaccination. No other vaccines were given within 4 weeks. No AE(s) following prior vaccinations. History of all previous immunization with the Pfizer vaccine considered as suspect: Vaccine Name: Pfizer Covid shot; first dose Lot Number/Expiry Date was unknown. Number of Previous Doses were none. Additional Vaccines Administered on Same Date of the Pfizer Suspect was none. Patient's Medical History (including any illness at time of vaccination) was none. On 03Aug2021, the patient experienced bad stomach issues, stomach discomfort, feels like he has a lot of gas. The patient had the second shot of the Pfizer-BioNTech COVID-19 Vaccine on Tuesday and since then he had been having bad stomach issues and stomach discomfort wanting to know if this is a common symptom or anything that he needs to be concerned about. Patient asked, Is this a common symptom? Is it anything he should worry about? Reporter stated he was calling regarding the Pfizer second shot, the Covid shot. He got the second shot Tuesday and has been having really bad stomach issues. It was last Tuesday; it has been 8 days. Afterwards, He was his regular doctor. He goes to this doctor when he gets a cold. Patient went to the doctor 2 days ago and told him about this. His doctor thinks it was that the stomach got inflamed. He gave him some medicine that help a little but, his doctor told him it would take a good 3 or 4 days to really kick in. It felt more like discomfort and not pain, it felt like a knot in his stomach. It started right after the got the shot. The doctor was saying maybe he was kind of nervous when getting it and thought maybe he stressed too much, and it messed up his stomach. He does not have a fever or any other symptoms. It is just his stomach; it feels like he has a lot of gas. It has gotten a little better, not so much, a little bit. Just feels something in there but, it is better. Doctor prescribed Prednisone and he gave him medicine so he wouldn't vomit. He hasn't been feeling like he was going to vomit so he hasn't been taking it. So, he has just been taking the Prednisone. He does not remember the name of the medicine for vomiting. He has it at home. First Dose he had received back in Apr2021. He got a really bad headache and was nervous about the second one. With the new variant, his family convinced him to get the second one, which was last Tuesday. Stated that it was maybe 13Apr2021 or 14Apr2021. Headache after first dose was maybe 3 hours later and lasted for 2 days. Treatment receive d was none. Had blood drawn 2 months ago at the doctors, there was nothing serious that came up. AE resulted to physician room visit but not emergency room visit. The patient underwent lab tests and procedures which included blood test resulted there was nothing serious that came up on an unspecified date of 2021 had blood drawn 2 months ago at the doctors. Therapeutic measures were taken as a result of bad stomach issues, stomach discomfort, feels like he has a lot of gas and included with treatment prednisone. Family Medical History relevant to AE was not there. Relevant Tests were none. The clinical outcome of the events was recovering.  No follow-up attempts are possible; information about lot/batch number cannot be obtained.