I am  experiencing a rash and worsening of my fibromyalgia symptoms; Achy cold; Muscle spasm; Sensitivity to pressure, pain; I am  experiencing a rash and worsening of my fibromyalgia symptoms; Joint pain; Have chills; This spontaneous case was reported by a nurse and describes the occurrence of FIBROMYALGIA (I am  experiencing a rash and worsening of my fibromyalgia symptoms), NASOPHARYNGITIS (Achy cold), MUSCLE SPASMS (Muscle spasm), PAIN (Sensitivity to pressure, pain) and RASH (I am  experiencing a rash and worsening of my fibromyalgia symptoms) in a 69-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     Concurrent medical conditions included Fibromyalgia. Concomitant products included PREDNISONE, BACLOFEN and ALPRAZOLAM (XANAX) for an unknown indication.    On 22-Nov-2021, the patient received third dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. In November 2021, the patient experienced FIBROMYALGIA (I am  experiencing a rash and worsening of my fibromyalgia symptoms), NASOPHARYNGITIS (Achy cold), MUSCLE SPASMS (Muscle spasm), PAIN (Sensitivity to pressure, pain), RASH (I am  experiencing a rash and worsening of my fibromyalgia symptoms), ARTHRALGIA (Joint pain) and CHILLS (Have chills). The patient was treated with PARACETAMOL (TYLENOL [PARACETAMOL]) for Adverse event, at an unspecified dose and frequency and DIPHENHYDRAMINE HYDROCHLORIDE (BENADRYL [DIPHENHYDRAMINE HYDROCHLORIDE]) for Adverse event, at an unspecified dose and frequency. At the time of the report, FIBROMYALGIA (I am  experiencing a rash and worsening of my fibromyalgia symptoms), NASOPHARYNGITIS (Achy cold), MUSCLE SPASMS (Muscle spasm), PAIN (Sensitivity to pressure, pain), RASH (I am  experiencing a rash and worsening of my fibromyalgia symptoms), ARTHRALGIA (Joint pain) and CHILLS (Have chills) had not resolved.        For mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular), the reporter did not provide any causality assessments.   The patient reported experiencing a rash and worsening of their fibromyalgia symptoms and sensitivity to pressure, pain, had chills, achy cold, joint pain, and muscle spasm. Reportedly all the symptoms were ongoing.  Company comment: This is a spontaneous  case concerning a 69-year-old female  patient with concurrent medical condition of Fibromyalgia.who experienced Fibromyalgia worsened, nasopharyngitis, muscle spasms, pain and rash. The events occurred after the third dose of mRNA-1273 vaccine (exact onset date unknown). Patient  experienced a rash, worsening of her fibromyalgia symptoms, sensitivity to pressure, pain, chills, achy cold, joint pain and muscle spasm. Treatment details were not provided. Concurrent medical condition of Fibromyalgia remains a confounder. The benefit-risk relationship of mRNA-1273 vaccine is not affected by this report.Sender's Comments: This is a spontaneous  case concerning a 69-year-old female  patient with concurrent medical condition of Fibromyalgia, who experienced Fibromyalgia worsened, nasopharyngitis, muscle spasms, pain and rash. The events occurred after the third dose of mRNA-1273 vaccine (exact onset date unknown). Patient  experienced rash, worsening of her fibromyalgia symptoms, sensitivity to pressure, pain, chills, achy cold, joint pain and muscle spasm. Treatment details were not provided. Concurrent medical condition of Fibromyalgia remains a confounder. The benefit-risk relationship of mRNA-1273 vaccine is not affected by this report.