Feels like he doesn't have control of his legs/walking.; not like himself for the past few months; right and left knee pain; lethargic, tired, exhaustion; feet feel...swollen; feet feel like they are going to burst; lethargic, tired, exhaustion; both feet burning; sore right arm; This case was received via an unknown source (no reference has been entered for a health authority or license partner) on 11-Jun-2021 and was forwarded to Moderna on 11-Jun-2021.    This spontaneous case was reported by a patient and describes the occurrence of BURNING SENSATION (both feet burning), LIMB DISCOMFORT (Feels like he doesn't have control of his legs/walking like Charlie Chaplin.), PERIPHERAL SWELLING (feet feel...swollen), CONTUSION (feet feel like they are going to burst) and LETHARGY (lethargic, tired, exhaustion) in an 89-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 027A21A and 031L20A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     The patient's past medical history included Nerve damage (nerve damage in his feet after he took the antibiotic Levaquin) and Burning sensation (Has not had the burning sensation for the past 15-20 years (since about year 2000)). Concurrent medical conditions included Hypertension. Concomitant products included AMLODIPINE BESILATE, VALSARTAN (EXFORGE) for Hypertension.   On 05-Feb-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 05-Mar-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) dosage was changed to 1 dosage form. On 05-Mar-2021, the patient experienced MYALGIA (sore right arm). On 29-Mar-2021, the patient experienced BURNING SENSATION (both feet burning), PERIPHERAL SWELLING (feet feel...swollen), CONTUSION (feet feel like they are going to burst), LETHARGY (lethargic, tired, exhaustion), ARTHRALGIA (right and left knee pain) and FATIGUE (lethargic, tired, exhaustion). On an unknown date, the patient experienced LIMB DISCOMFORT (Feels like he doesn't have control of his legs/walking like Charlie Chaplin.) and LOSS OF PERSONAL INDEPENDENCE IN DAILY ACTIVITIES (not like himself for the past few months). The patient was treated with IBUPROFEN (ADVIL [IBUPROFEN]) ongoing since an unknown date for Pain and Sleep disorder due to a general medical condition, at an unspecified dose and frequency. On 08-Mar-2021, MYALGIA (sore right arm) had resolved. At the time of the report, BURNING SENSATION (both feet burning), LIMB DISCOMFORT (Feels like he doesn't have control of his legs/walking like Charlie Chaplin.), PERIPHERAL SWELLING (feet feel..swollen), CONTUSION (feet feel like they are going to burst), LETHARGY (lethargic, tired, exhaustion), LOSS OF PERSONAL INDEPENDENCE IN DAILY ACTIVITIES (not like himself for the past few months), ARTHRALGIA (right and left knee pain) and FATIGUE (lethargic, tired, exhaustion) outcome was unknown.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On 01-Jun-2021, SARS-CoV-2 test: negative (Negative) Negative.     mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) dosing remained unchanged.   For mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular), the reporter did not provide any causality assessments.   Patient reported seeing an orthopedic physician for the knee pain. Knee Xrays were taken and no cause was found. The patient also reported he saw another HCP about 10 days ago who completed tests to try to determine the cause of his tiredness. The tests were found to be normal.   The patient also reported he used Ice to help alleviate his knee and feet pain.