shingles/expanding shingles; could not go to work; sartorius muscle tear on the right; skin feels sensitive on both sides of lower back.; pain in lower right back, and into groin/pain on both sides of my lower back has increased significantly; pain in lower right back, and into groin; right neck pain; This spontaneous case was reported by a patient and describes the occurrence of NECK PAIN (right neck pain), GROIN PAIN (pain in lower right back, and into groin), SKIN SENSITISATION (skin feels sensitive on both sides of lower back.), MUSCLE STRAIN (sartorius muscle tear on the right) and BACK PAIN (pain in lower right back, and into groin/pain on both sides of my lower back has increased significantly) in a female patient of an unknown age who received mRNA-1273 BIVALENT .222 (MODERNA COVID-19 VACCINE, BIVALENT (ORIGINAL AND OMICRON BA.4/BA.5)) (batch no. 019H22A) for COVID-19 prophylaxis. The occurrence of additional non-serious events is detailed below.     Previously administered products included for Product used for unknown indication: Pfizer COVID-19 Vaccine (1st dose, Lot: EK5730) on 29-Dec-2020, Pfizer COVID-19 Vaccine (2nd dose, Lot: EL1283) on 19-Jan-2021, Pfizer COVID-19 Vaccine (1st booster  andLot: EW0185) on 04-Oct-2021. Past adverse reactions to the above products included No adverse event with Pfizer COVID-19 Vaccine, Pfizer COVID-19 Vaccine and Pfizer COVID-19 Vaccine.    On 04-Nov-2022, the patient received fourth dose of mRNA-1273 BIVALENT .222 (MODERNA COVID-19 VACCINE, BIVALENT (ORIGINAL AND OMICRON BA.4/BA.5)) (unknown route) 1 dosage form. On 05-Nov-2022, the patient experienced NECK PAIN (right neck pain). On 10-Nov-2022, the patient experienced GROIN PAIN (pain in lower right back, and into groin) and BACK PAIN (pain in lower right back, and into groin/pain on both sides of my lower back has increased significantly). On 15-Nov-2022, the patient experienced SKIN SENSITISATION (skin feels sensitive on both sides of lower back.). On 16-Nov-2022, the patient experienced MUSCLE STRAIN (sartorius muscle tear on the right). On an unknown date, the patient experienced HERPES ZOSTER (shingles/expanding shingles) and IMPAIRED WORK ABILITY (could not go to work). At the time of the report, NECK PAIN (right neck pain), GROIN PAIN (pain in lower right back, and into groin), SKIN SENSITISATION (skin feels sensitive on both sides of lower back.), MUSCLE STRAIN (sartorius muscle tear on the right), BACK PAIN (pain in lower right back, and into groin/pain on both sides of my lower back has increased significantly), HERPES ZOSTER (shingles/expanding shingles) and IMPAIRED WORK ABILITY (could not go to work) outcome was unknown.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On 16-Nov-2022, Computerised tomogram: It looks ok. It does show a sartorius muscle tear on the right..     For mRNA-1273 BIVALENT .222 (MODERNA COVID-19 VACCINE, BIVALENT (ORIGINAL AND OMICRON BA.4/BA.5)) (Unknown), the reporter did not provide any causality assessments.   Concomitant medications details were not reported by the reporter. 05-Nov-2022, patient began experiencing right neck pain. On 10-Nov-2022, had pain in lower right back, and into groin. On 15-Nov-2022, her skin felt sensitive on both sides of lower back. On 16-Nov-2022, CT was done. It looked ok. It did show a sartorius muscle tear on the right. On 17-Nov-2022, the pain on both sides of her lower back has increased significantly. Most severe was her right lower back into her groin.  The patient noticed a rash on her right thigh and recognized it as shingles. It has spread not only to the whole thigh but had similar lesions on the neck and the mic back on the right. She continued to have excruciating pain in the low back and groin to the extent that sheI could not go to work. She might need to go to the ED due to the expanding shingles and the pain.  Treatment details was not reported by the reporter.   Most recent FOLLOW-UP information incorporated above includes: On 20-Nov-2022: Follow-up received: new events added, narrative updated.