her legs are sore because of the swelling.; Her left foot was noted to be swollen up to the middle of her calf; dizziness; Body aches; headache; right leg was swollen from the thigh to the toes/ she normally would have on and off swelling of her right leg/ left foot was noted to be swollen up to the middle of her calf/swelling is more noticeable this time; This spontaneous case was reported by a nurse and describes the occurrence of PERIPHERAL SWELLING (right leg was swollen from the thigh to the toes/ she normally would have on and off swelling of her right leg/ left foot was noted to be swollen up to the middle of her calf/swelling is more noticeable this time), PAIN IN EXTREMITY (her legs are sore because of the swelling.), PERIPHERAL SWELLING (Her left foot was noted to be swollen up to the middle of her calf), DIZZINESS (dizziness) and MYALGIA (Body aches) in a female patient of an unknown age who received mRNA-1273 (Spikevax) (batch no. 033K21-21A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     Concurrent medical conditions included Osteoarthritis, Fibromyalgia (diagnosed 30 years ago.), Drug allergy (codeine), Polymyalgia rheumatica (she was placed on prednisone for 4 years (2017 up to Feb2022).), Asthma, Swelling of feet (swelling of left foot), Drug allergy (gabapentin), Drug allergy (Toradol) and Drug allergy (Tramadol). Concomitant products included INFLUENZA VACCINE INACT SPLIT 4V (QUADRIVALENT INFLUENZA VACCINE) for an unknown indication.    On 05-Mar-2022, the patient received first dose of mRNA-1273 (Spikevax) (unknown route) 1 dosage form. On 06-Mar-2022, the patient experienced PERIPHERAL SWELLING (right leg was swollen from the thigh to the toes/ she normally would have on and off swelling of her right leg/ left foot was noted to be swollen up to the middle of her calf/swelling is more noticeable this time). On an unknown date, the patient experienced PAIN IN EXTREMITY (her legs are sore because of the swelling.), PERIPHERAL SWELLING (Her left foot was noted to be swollen up to the middle of her calf), DIZZINESS (dizziness), MYALGIA (Body aches) and HEADACHE (headache). The patient was treated with FUROSEMIDE (LASIX [FUROSEMIDE]) on 07-Mar-2022 for Swelling of legs, at a dose of 20 milligram,1 tab,once. At the time of the report, PERIPHERAL SWELLING (right leg was swollen from the thigh to the toes/ she normally would have on and off swelling of her right leg/ left foot was noted to be swollen up to the middle of her calf/swelling is more noticeable this time), PAIN IN EXTREMITY (her legs are sore because of the swelling.) and PERIPHERAL SWELLING (Her left foot was noted to be swollen up to the middle of her calf) had not resolved and DIZZINESS (dizziness), MYALGIA (Body aches) and HEADACHE (headache) outcome was unknown.        The action taken with mRNA-1273 (Spikevax) (Unknown) was unknown.   For mRNA-1273 (Spikevax) (Unknown), the reporter did not provide any causality assessments.   Patient was not sure whether her left foot was noted to be swollen up to the middle of her calf on reporting day or a day before reporting day. Patient is 5' 3 3/4"in height. Patient mentioned that she normally would have on and off swelling of her right leg because of an osteoarthritis at the right knee which she had even before the vaccine but the swelling was more noticeable this time. She also added that she experienced swelling of her left foot before. She said that the body aches may be due to that she was having fibromyalgia.