changes in my bowel habit after 2nd shot; there is change is consistency; I have to go frequently; my stool is firm; small in amount, soft stool ,about the size of a walnut, which explodes from my rectum like a little torpedo; it's just I feel messy/and inconvenient; diarrhea; Unusual bowel movements; This spontaneous case was reported by an other health care professional and describes the occurrence of FREQUENT BOWEL MOVEMENTS (changes in my bowel habit after 2nd shot), ABNORMAL FAECES (there is change is consistency), FREQUENT BOWEL MOVEMENTS (I have to go frequently), ABNORMAL FAECES (my stool is firm) and ABNORMAL FAECES (small in amount, soft stool ,about the size of a walnut, which explodes from my rectum like a little torpedo) in a 69-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 001A21A and 013M20A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     Previously administered products included for an unreported indication: HERPES SIMPLEX 1 VACCINE (Shingles vaccine - dose 1) in January 2021. Concurrent medical conditions included Sulfonamide allergy (Sulfa drugs/Septra). Concomitant products included IRON from January 2021 to an unknown date and CYANOCOBALAMIN (VIT B12) from 2021 to an unknown date for an unknown indication.   On 03-Feb-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 03-Mar-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) dosage was changed to 1 dosage form. On an unknown date, the patient experienced FREQUENT BOWEL MOVEMENTS (changes in my bowel habit after 2nd shot), ABNORMAL FAECES (there is change is consistency), FREQUENT BOWEL MOVEMENTS (I have to go frequently), ABNORMAL FAECES (my stool is firm), ABNORMAL FAECES (small in amount, soft stool ,about the size of a walnut, which explodes from my rectum like a little torpedo), FEELING ABNORMAL (it's just I feel messy/and inconvenient), DIARRHOEA (diarrhea) and BOWEL MOVEMENT IRREGULARITY (Unusual bowel movements). The patient was treated with POLYCARBOPHIL CALCIUM (FIBER) ongoing since an unknown date for Adverse event, at a dose of 1 dosage form. At the time of the report, FREQUENT BOWEL MOVEMENTS (changes in my bowel habit after 2nd shot) and BOWEL MOVEMENT IRREGULARITY (Unusual bowel movements) had not resolved and ABNORMAL FAECES (there is change is consistency), FREQUENT BOWEL MOVEMENTS (I have to go frequently), ABNORMAL FAECES (my stool is firm), ABNORMAL FAECES (small in amount, soft stool ,about the size of a walnut, which explodes from my rectum like a little torpedo), FEELING ABNORMAL (it's just I feel messy/and inconvenient) and DIARRHOEA (diarrhea) outcome was unknown.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On 11-Jun-2021, Colonoscopy: normal (normal) normal.     For mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular), the reporter did not provide any causality assessments.   Patient says on 6-11-21 , Multiple Biopsy's and Culture's were also done , results were all normal   Most recent FOLLOW-UP information incorporated above includes: On 18-Aug-2021: Significant followup: Patients demographics, relevant history, vaccine batch number and concomitant drugs details are added.