noticed an increase in her swelling and is filling up with fluid in her extremities; filling up with fluid in her extremities; Her arm was a little sore; swelling in my feet, my legs, my ankles, and my hands.; swelling in my feet, my legs, my ankles, and my hands./increased swelling in ankles; This is a spontaneous report from a contactable consumer(patient) reported for herself via medical information team. A 88-years-old female patient received BNT162B2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE; Formulation: Solution for injection, Lot Number, Expiry Date and NDC number was unknown) via unspecified route of administration 02Jun2021, Wednesday in left arm (88-years-old at the time of vaccination) as a dose 1, single for COVID-19 immunisation. Medical history included ongoing CHF (congestive heart failure), patient was on a diuretic from an unknown date, she also takes vitamins including, Omega 3, calcium, Ocuvite for her eyes. Concomitant medications included phenytoin (DILANTIN [PHENYTOIN]), 90mg in the morning 100mg at night taken for an unspecified indication from an unspecified start date and ongoing; warfarin sodium (COUMADIN), varies, right now on Mondays, Thursdays, and Saturdays, she takes 6mg, and the rest of the week 4mg taken for an unspecified indication; potassium taken for an unspecified indication; metoprolol (150mg) 50mg in the morning, and 100mg at night taken for an unspecified indication; torsemide, 3 tables of 20mg, 60mg a day taken for an unspecified indication; calcium taken for her eyes; cyanocobalamin (B12 [CYANOCOBALAMIN]) taken for eye disorder; fish oil (OMEGA 3 [FISH OIL]) taken for eyes; ascorbic acid/betacarotene/copper/tocofersolan, zinc (OCUVITE [ASCORBIC ACID;BETACAROTENE;COPPER;TOCOFERSOLAN;ZINC]) taken for eyes. All concomitant drugs were taken from an unspecified start date and ongoing. She just had the vaccine last Wednesday (02Jun2021). she noticed an increase in her swelling and is filling up with fluid in her extremities. Patient stated that she was on a diuretic and other medications. when she went to get the vaccine, she was fine, had a doctor's appointment that same day and she was fine. But on Sunday, was getting swelling in her feet, legs, ankles and hands and increased swelling in ankles (06June2021). Her ankle swelling and everything was down. She did not know if it is from the vaccine, but her swelling is up now. She is filling up with fluid. She has been taking her normal medications. She was wondering if the vaccine could had anything to do with it. She got the vaccine last Wednesday 02Jun2021. She noticed the increase of swelling on Sunday 06June2021. She had no other problems with the vaccine. Her arm was a little sore, but that was no big deal. The product was the COVID 19 vaccine that she received. She did not have a prescribing doctor. She went into walk in. She is just concerned. Her second dose is scheduled for 23Jun2021. The arm soreness was nothing on the second day but started about day 3 or 4. It was not so bad today, but still there. It has improved. day before reporting, the swelling was really bad. On reporting day it was not as bad. She was on multiple medications. Outcome of the event filling up with fluid in her extremities was unknown. Outcome of the other events was recovering.  Information about lot/batch has been requested.