Her mouth was full of sores and blister, inside her mouth, lips and tongue; Her mouth was full of sores and blister, inside her mouth, lips and tongue; She feels she was scrooge/ She was really mad for these situation; Gums were swollen; Roof of her mouth was blistered and was very really painful/looked like raw meat; Mouth was sore, mouth was red/her mouth was full of sores; Throat hurt has gotten worse; Mouth was hurting really bad/ mouth was hurting so much that she does not want to talk anymore; Mouth was bleeding, it looked almost cut; Gums bleed when she brushed her teeth; Gums were hurting really bad; Gums were blistered; Discomfort in mouth; Sore arm; This spontaneous case was reported by a consumer and describes the occurrence of MOUTH HAEMORRHAGE (Mouth was bleeding, it looked almost cut), GINGIVAL BLEEDING (Gums bleed when she brushed her teeth), GINGIVAL PAIN (Gums were hurting really bad), GINGIVAL BLISTER (Gums were blistered) and GINGIVAL SWELLING (Gums were swollen) in a 33-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 071F21A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below. Concurrent medical conditions included Medullary cystic disease and Allergy to chemicals.Concomitant products included NALTREXONE for Medullary cystic disease, LORAZEPAM, QUETIAPINE, TIZANIDINE and MULTIVITAMIN [VITAMINS NOS] for an unknown indication. On 05-Nov-2021, the patient received third dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 05-Nov-2021, the patient experienced GINGIVAL BLEEDING (Gums bleed when she brushed her teeth), GINGIVAL PAIN (Gums were hurting really bad), GINGIVAL BLISTER (Gums were blistered), ORAL DISCOMFORT (Discomfort in mouth) and PAIN IN EXTREMITY (Sore arm). On 06-Nov-2021, the patient experienced MOUTH HAEMORRHAGE (Mouth was bleeding, it looked almost cut), GINGIVAL SWELLING (Gums were swollen), ORAL MUCOSAL BLISTERING (Roof of her mouth was blistered and was very really painful/looked like raw meat), MOUTH ULCERATION (Mouth was sore, mouth was red/her mouth was full of sores), ORAL PAIN (Mouth was hurting really bad/ mouth was hurting so much that she does not want to talk anymore) and OROPHARYNGEAL PAIN (Throat hurt has gotten worse). On an unknown date, the patient experienced STOMATITIS (Her mouth was full of sores and blister, inside her mouth, lips and tongue), TONGUE BLISTERING (Her mouth was full of sores and blister, inside her mouth, lips and tongue) and FEELING ABNORMAL (She feels she was scrooge/ She was really mad for these situation). The patient was treated with IBUPROFEN (ADVIL [IBUPROFEN]) at an unspecified dose and frequency; IBUPROFEN at an unspecified dose and frequency; VALACICLOVIR HYDROCHLORIDE (VALACYCLOVIR HCL) (oral) ongoing from 08-Nov-2021 for Blistering of mouth, at a dose of 1 g three times a day and LIDOCAINE (oral) for Blistering of mouth, at an unspecified dose and frequency. At the time of the report, MOUTH HAEMORRHAGE (Mouth was bleeding, it looked almost cut), GINGIVAL BLEEDING (Gums bleed when she brushed her teeth), GINGIVAL PAIN (Gums were hurting really bad), GINGIVAL BLISTER (Gums were blistered), GINGIVAL SWELLING (Gums were swollen), ORAL MUCOSAL BLISTERING (Roof of her mouth was blistered and was very really painful/looked like raw meat), MOUTH ULCERATION (Mouth was sore, mouth was red/her mouth was full of sores), STOMATITIS (Her mouth was full of sores and blister, inside her mouth, lips and tongue), TONGUE BLISTERING (Her mouth was full of sores and blister, inside her mouth, lips and tongue), ORAL PAIN (Mouth was hurting really bad/ mouth was hurting so much that she does not want to talk anymore), ORAL DISCOMFORT (Discomfort in mouth), OROPHARYNGEAL PAIN (Throat hurt has gotten worse), FEELING ABNORMAL (She feels she was scrooge/ She was really mad for these situation) and PAIN IN EXTREMITY (Sore arm) outcome was unknown. DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available):On 06-Nov-2021, Culture throat: (Negative) Negative. On 06-Nov-2021, Viral test: (Positive) Positive. For mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular), the reporter considered MOUTH ULCERATION (Mouth was sore, mouth was red/her mouth was full of sores) and STOMATITIS (Her mouth was full of sores and blister, inside her mouth, lips and tongue) to be possibly related. No further causality assessments were provided for MOUTH HAEMORRHAGE (Mouth was bleeding, it looked almost cut), GINGIVAL BLEEDING (Gums bleed when she brushed her teeth), GINGIVAL PAIN (Gums were hurting really bad), GINGIVAL BLISTER (Gums were blistered), GINGIVAL SWELLING (Gums were swollen), ORAL MUCOSAL BLISTERING (Roof of her mouth was blistered and was very really painful/looked like raw meat), TONGUE BLISTERING (Her mouth was full of sores and blister, inside her mouth, lips and tongue), ORAL PAIN (Mouth was hurting really bad/ mouth was hurting so much that she does not want to talk anymore), ORAL DISCOMFORT (Discomfort in mouth), OROPHARYNGEAL PAIN (Throat hurt has gotten worse), FEELING ABNORMAL (She feels she was scrooge/ She was really mad for these situation) and PAIN IN EXTREMITY (Sore arm). Patient had initial doses of Pfizer vaccine and was administered booster dose of Moderna vaccine. On 05-Nov-2021, she noticed discomfort in her mouth. Woken up in the middle of the night from the sore arm, applied ice pack to the soreness. The reporter visited to a clinic on 06-Nov-2021, the doctor did strep throat swab and shingles swab which returned negative. The doctor did think it was oral thrush. A viral test (caller did not know which viral test it was for exactly) returned positive. Concomitant medications included for medullary cystic kidney disease, caller claimed normal kidney function, on low dose naltrexone when necessary for pain from the kidney disease. Following up with a psychiatrist, taking lorazepam 1mg when necessary, quetiapine 25mg every night, tizanidine 4 mg once daily, also a vitamin/folic acid and following up with a urologist, prescribed with progesterone cream. Dentist gave caller laser treatment over the blisters in her mouth and prescribed her with lidocaine mouthwash to use in conjunction with the magic mouthwash. Treatment include swishes onugard oil with water and Magic Mouthwash which was a numbing agent, to swish and spit when necessary. Most recent FOLLOW-UP information incorporated above includes:On 07-Nov-2021: Follow up received and it contains information about patient demographics and treatment medications were updated and new events added.On 09-Nov-2021: Follow up received and it contain information about concomitant medications and new events were added.On 11-Nov-2021: Follow up received and it contain newinformation about medical history, lab data and events.