skin gets hot and then the hives pop up, it comes and goes; felt like I could not breathe; had huge hives that spread to all over my body/had hives in my throat/had these hive all over my body, scalp, bottom of feet, hands, private area, face, I look like a monster/Anytime I get a flare up, I know it coming; they were itchy; underneath of both of my arms were swollen; underneath of both of my arms were painful; This spontaneous case was reported by a consumer and describes the occurrence of URTICARIA (had huge hives that spread to all over my body/had hives in my throat/had these hive all over my body, scalp, bottom of feet, hands, private area, face, I look like a monster/Anytime I get a flare up, I know it coming), PRURITUS (they were itchy), SWELLING (underneath of both of my arms were swollen), DYSPNOEA (felt like I could not breathe) and SKIN WARM (skin gets hot and then the hives pop up, it comes and goes) in a 29-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 041J21A, 028A21A and 012A21A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     No Medical History information was reported.   On 27-Feb-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 27-Mar-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) dosage was changed to 1 dosage form. On 27-Dec-2021, received third dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 29-Dec-2021, the patient experienced SWELLING (underneath of both of my arms were swollen) and AXILLARY PAIN (underneath of both of my arms were painful). On 05-Jan-2022, the patient experienced URTICARIA (had huge hives that spread to all over my body/had hives in my throat/had these hive all over my body, scalp, bottom of feet, hands, private area, face, I look like a monster/Anytime I get a flare up, I know it coming) and PRURITUS (they were itchy). On 09-Jan-2022, the patient experienced DYSPNOEA (felt like I could not breathe). On an unknown date, the patient experienced SKIN WARM (skin gets hot and then the hives pop up, it comes and goes). The patient was treated with PREDNISONE from January 2022 to January 2022 for Adverse event, at a dose of 10 milligram and PREDNISONE from 09-Jan-2022 to January 2022 for Adverse event, at a dose of 60 milligram. At the time of the report, URTICARIA (had huge hives that spread to all over my body/had hives in my throat/had these hive all over my body, scalp, bottom of feet, hands, private area, face, I look like a monster/Anytime I get a flare up, I know it coming), PRURITUS (they were itchy), SWELLING (underneath of both of my arms were swollen), DYSPNOEA (felt like I could not breathe), SKIN WARM (skin gets hot and then the hives pop up, it comes and goes) and AXILLARY PAIN (underneath of both of my arms were painful) outcome was unknown.            Concomitant medication of the patient was not reported.  The patient thought the swelling and painful of underneath of both of arms was might be COVID arm. On 07-Jan-2022, the patient went to the doctor and the doctor prescribed 10 mg prednisone which did not work. On 09-Jan-2022, the patient went to the urgent care and the prednisone dose was increased from 10 mg to 60 mg. On 10-Jan-2022, the patient went to the dermatologist and the dermatologist indicated that the patient should stop taking prednisone because it was masking the symptoms. The dermatologist gave topical steroid cream instead. The reporter listed off a lot of areas where these hives were located but summarized it as all over her body.