fluid in legs; ankles says everything gets hard; toes look like sausages; palpitations only lasted 1 day; leg swelling/legs were swollen puffy/swelling in feet; This spontaneous case was reported by a consumer and describes the occurrence of PERIPHERAL SWELLING (leg swelling/legs were swollen puffy/swelling in feet), OEDEMA PERIPHERAL (fluid in legs), JOINT STIFFNESS (ankles says everything gets hard), FOOT DEFORMITY (toes look like sausages) and PALPITATIONS (palpitations only lasted 1 day) in a female patient of an unknown age who received mRNA-1273 (Moderna COVID-19 Vaccine) for COVID-19 vaccination.     The patient did not have any prior cardiac history.  It was unknown whether the patient had allergies to medications, food and other products or not and whether the patient ever had been tested positive or diagnosed with COVID-19 or not.  Previously administered products included for COVID-19 vaccination: Pfizer (had previously received 3 Pfizer doses). Past adverse reactions to the above products included No adverse event with Pfizer.    On an unknown date, the patient received fourth dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 03-Apr-2022, the patient experienced PERIPHERAL SWELLING (leg swelling/legs were swollen puffy/swelling in feet) and PALPITATIONS (palpitations only lasted 1 day). On an unknown date, the patient experienced OEDEMA PERIPHERAL (fluid in legs), JOINT STIFFNESS (ankles says everything gets hard) and FOOT DEFORMITY (toes look like sausages). The patient was treated with Physical therapy (elliptical palliates) for Peripheral swelling and Physical therapy (elliptical palliates) for Oedema peripheral. On 03-Apr-2022, PALPITATIONS (palpitations only lasted 1 day) had resolved. At the time of the report, PERIPHERAL SWELLING (leg swelling/legs were swollen puffy/swelling in feet) and FOOT DEFORMITY (toes look like sausages) had not resolved and OEDEMA PERIPHERAL (fluid in legs) and JOINT STIFFNESS (ankles says everything gets hard) outcome was unknown.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On an unknown date, Computerised tomogram: zero ct score (normal) zero CT score. On an unknown date, Electrocardiogram: no heart issues (normal) no heart issues. On an unknown date, Ultrasound scan: fluid in legs (abnormal) fluid in legs.         No concomitant medication information was provided.  The patient was thrilled with receiving the fourth Moderna vaccine booster dose. On 03-Apr-2022, the patient had consumed food that was vegetarian put soy sauce on. On that night, the patient had palpitations (for 1 day) and leg swelling.  The patient had bed where the patient could raise legs. The patient went to the vein physician who denied that those were patient's legs due to appearance of swelling, had no leg definition in shin, and stated that the patient normally had great ankles and the toes did not normally look like sausages.  The patient had undergone ultrasound of leg for clot and fluid was found in patient's legs. The physician made the patient to do elliptical palliates.  The patient went to a cardiologist and result looked normal. The patient have not wanted to go for an emergency room visit.  The patient's legs were so swollen that the patient had to wear pant hose, and when the patient wears them, the patient feels like swelling was not as much and when the patient wakes up, the patient feels that the legs were normal.  Sometimes, the patient could not get the feet in through pants. The patient did not experience these adverse events in the past.