stomach cramping; At the site of injection there was bruising and whelps; Bruising on arm; then diarrhea for 6 days and really bad explosive kind; welts and red swollen on arm and then chills and nausea and vomiting and more diarrhea and stomach pain lots.; welts and red swollen on arm and then chills and nausea and vomiting and more diarrhea and stomach pain lots.; welts and red swollen on arm and then chills and nausea and vomiting and more diarrhea and stomach pain lots.; welts and red swollen on arm and then chills and nausea and vomiting and more diarrhea and stomach pain lots.; welts and red swollen on arm and then chills and nausea and vomiting and more diarrhea and stomach pain lots.; welts and red swollen on arm and then chills and nausea and vomiting and more diarrhea and stomach pain lots.; welts and red swollen on arm and then chills and nausea and vomiting and more diarrhea and stomach pain lots.; Tired; I just I feel miserable; it's blowout, it making hard for me to work,; This is a spontaneous report from a contactable consumer (patient). A 51-year-old female patient received bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE, Solution for injection), via an unspecified route of administration, administered in Arm Left on 01May2021 09:00 (Batch/Lot Number: EW0171) as dose 2, single (at the age of 51-year-old) for covid-19 immunisation. Medical history included anxiety, depression and ocd from an unknown date and unknown if ongoing. The patient previously took codeine for hypersensitivity. The patient did not receive any other vaccines within 4 weeks prior to the COVID vaccine. Concomitant medication(s) included duloxetine hydrochloride (CYMBALTA), bupropion hydrochloride (WELLBUTRIN), hydroxyzine hydrochloride (HYDROXIZINE). The patient previously received bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE, lot number-ER8732) at left arm on 03Apr2021 09:00 as dose 1, single for covid-19 immunisation. On 02May2021, the patient experienced bruising on arm, then diarrhea for 6 days and really bad explosive kind and then welts and red swollen on arm and then chills and nausea and vomiting and more diarrhea and stomach pain lots. Tired. No fun at all and still dealing with this, 6 days out. Have had to be off work as well. Almost went to er last night. The patient stated she was on day 18 now after the second Pfizer shot, she had for covid and she still have stomach issues and diarrhea a lot of it every single day and she had been tested for every single thing as well as for Covid and she does not have any of that. She also stated that it is like every day, it's blowout, it making hard for me to work, there's lot of days she had to take a off so. She further stated she have had test Influenza A and B, two Covid tests and neurovirus toxin, every test available and nothing was coming back positive. So the first shot was on 03Apr2021. Caller stated she was having a really bad reaction to the Pfizer COVID 19 vaccine. She has extreme diarrhea, stomach cramping, and chills off and on. She has been tested by her doctor and everything has come back negative. She was going to the bathroom every 20 min. Now, within 1/2 to 1 hour after eating she has to go to the bathroom. She was not eating much. She started a heavy-duty antibiotic yesterday. She was taking Imodium. At the site of injection there was bruising and whelps I just I feel miserable. They subsided, but then after a bad bought of diarrhea, on about day 12, the red whelps returned. The adverse event resulted in Doctor or other healthcare professional office/clinic visit. The patient underwent 2 covid tests on 06May2021, Nasal swab tests (a rapid one and one with results in 2 to 4 days), result was negative and another Nasal Swab, result pending. Prior to vaccination, the patient was not diagnosed with COVID-19. The outcome of the events bruising on arm, then diarrhea for 6 days and really bad explosive kind, welts and red swollen on arm and then chills and nausea and vomiting and more diarrhea and stomach pain lots, tired was not recovered and for rest it was unknown.  No Follow-up attempts completed. No further information is expected.