really extreme adverse reaction; optical nerve pain; waves coming back of chills; dizziness; diarrhea; outer extremities would just shake; doesn't feel right; don't want to die after having this vaccine; fever; right arm had neurological tingles; elevated heart beat/increased heart rate; felt like really hard pressure on chest; hyperventilating; clammy hands and feet; red rash on cheeks and chest; got really hot; sweating; almost to the point of shortness of breath; lost sensation in face; eyes felt very bulged like a pressure; A spontaneous report was received from a consumer concerning a 34-year-old, female patient, who received Moderna's COVID-19 vaccine (mRNA-1273) and experienced increased heart rate (tachycardia), right arm had neurological tingles (hemiparaesthesia), got really hot (feeling hot), sweating (hyperhidrosis), almost to the point of shortness of breath (dsypnoea), lost sensation in face (sensory loss), eyes felt very bulged like a pressure (ocular discomfort), felt like really hard pressure on chest (chest discomfort), hyperventilating (hyperventilation), clammy hands and feet (cold sweat), and red rash on cheeks and chest (rash erythematous).   The patient's medical history, as provided by the reporter, included anxiety and a history of allergies (but nothing life-threatening).  Concomitant product use was not provided.  On 05 Feb 2021, approximately 15 minutes prior to the onset of symptoms, the patient received their first of two planned doses of mRNA-1273 (Lot number: 013M20A) in the left arm for prophylaxis of COVID-19 infection.  The patient had the first dose of the Moderna vaccine Friday 05 Feb 2021 around 5:00 in left non dominant arm. The patient made the facility aware that she had a history of allergies (but nothing life threatening) so they monitored her for 30 minutes. Within 15 minutes of vaccine administration, the patient developed a red rash on her cheeks and chest. She started getting really, really hot and sweating, and was almost to the point of shortness of breath. The patient got cold water and turned on the air conditioner. She then lost sensation in her face for about an hour and a half, and her eyes felt very "bulged" like a pressure. About 8-12 hours later the occipital bone of her neck was really hot. She feel like she's getting a really extreme adverse reaction. Later Saturday night, 06-Feb-2021, the patient went to the emergency room. She had an elevated heartbeat and increased heart rate, and she felt like really hard pressure was on her chest. The patient was hyperventilating withdeep sweats, and said "it keeps coming on and off". The patient reported still getting clammy hands and clammy feet, and that her heart rate kept going up. Though she got vaccine on the left arm, the patient reported that her right arm had neurological tingles. At the ER, patient was given alprazolam; then she was asked to leave. Patient stated she was having waves where she had elevated heart rate about 140-160 and high intense heat along with optical nerve pain.  Patient took diphenhydramine which she stated slowed down the heart rate and provided relief although patient was still experiencing waves coming back of chills, fever, sweating and elevated heart rate.  On morning of 10 Feb 2021, the patient woke from sleep with extreme high heart rate and she broke out in a sweat.  The patient experienced dizziness, diarrhea, and her occipital area behind the neck got extremely hot.  She also reported that the rash came back on her chest, and her legs and outer extremities would shake. The patient stated "it doesn't feel right. I don't want to die after having this vaccine. The warm fuzzy reaction has just not gone from my body."  Action taken with mRNA-1273 in response to the events was unknown.  The outcomes of the events, increased heart rate, right arm had neurological tingles, got really hot, sweating, almost to the point of shortness of breath, lost sensation in face, eyes felt very bulged like a pressure, felt like really hard pressure on chest, hyperventilating, clammy hands and feet, and red rash on cheeks and chest were not reported.; Reporter's Comments: Very limited information regarding this events has been provided at this time.  Further information has been requested.