gas; bloating with absolutely everything I ate; swelling under my rib cage but it is getting milder; I also had the common side effects of chills, fever (99-100), aching; I also had the common side effects of chills, fever (99-100), aching; I also had the common side effects of chills, fever (99-100), aching; The joints on the injection side are still a bit swollen; The shot was a booster for my previous J&J shot; The shot was a booster for my previous J&J shot; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A 57 year-old female patient (not pregnant) received bnt162b2 (BNT162B2), administered in arm left, administration date 03Jan2022 12:00 (Lot number: FL3209) at the age of 57 years as dose number unknown (booster), single for covid-19 immunisation. Relevant medical history included: "Ankylosing spondylitis" (unspecified if ongoing); "Hashimoto's Thyroiditis" (unspecified if ongoing); "Cushings Disease" (unspecified if ongoing); "pituitary origin" (unspecified if ongoing), notes: pituitary origin, in remission without, medication or surgery. Concomitant medication(s) included: LEVOTHYROXINE; SPIRONOLACTONE; ATORVASTATIN. Past drug history included: Remicade, reaction(s): "allergies: Remicade"; Humira, reaction(s): "Allergies:Humira". Vaccination history included: J&j shot (The shot was a booster for my, previous J&J shot), for Covid-19 immunization. The following information was reported: OFF LABEL USE (non-serious), INTERCHANGE OF VACCINE PRODUCTS (non-serious) all with onset 03Jan2022 12:00, outcome "unknown" and all described as "The shot was a booster for my previous J&J shot"; FLATULENCE (non-serious) with onset 04Jan2022, outcome "not recovered", described as "gas"; ABDOMINAL DISTENSION (non-serious) with onset 04Jan2022, outcome "not recovered", described as "bloating with absolutely everything I ate"; SWELLING (non-serious) with onset 04Jan2022, outcome "not recovered", described as "swelling under my rib cage but it is getting milder"; CHILLS (non-serious), PYREXIA (non-serious), PAIN (non-serious) all with onset 04Jan2022, outcome "not recovered" and all described as "I also had the common side effects of chills, fever (99-100), aching"; JOINT SWELLING (non-serious) with onset 04Jan2022, outcome "not recovered", described as "The joints on the injection side are still a bit swollen". Relevant laboratory tests and procedures are available in the appropriate section. Therapeutic measures were not taken as a result of flatulence, abdominal distension, swelling, chills, pyrexia, pain, joint swelling.  Additional Information: Dose Received:1, dose number=1. No other vaccine in four weeks. The shot was a booster for her previous J&J shot. About 36 hours after the shot she began getting severe abdominal cramping, gas and bloating with absolutely everything she ate. Dairy and any type of green chiles were the worst causing horrible smelling flatulence, she NEVER had any kind of dairy allergy or intolerance to spicy food (Thai, New Mexican, Indian, etc). It is 22Jan2022 and she was still having some cramping and swelling under her rib cage but it was getting milder. She felt like the booster threw off her gut flora. She also had the common side effects of chills, fever (99-100), aching, etc along with a pretty bad autoimmune flare-up. The joints on the injection side are still a bit swollen but this should resolve when she start Cosentyx on 27Jan2022. No covid prior vaccination and no covid tested post vaccination.  No follow-up attempts are possible. No further information is expected.