rash continued to spread down her back to her left leg, to her right arm, right hand, and right side of her face.; rash spread down her back and right arm; whole body rash/chickenpox type rash; pimples along her hairline which looked more like a chickenpox type rash spreading down her neck and left arm.; pimples along her hairline which looked more like a chickenpox type rash spreading down her neck and left arm.; abdominal pain; stomach cramps; swollen lump; red rash at the injection site; nausea; headache; normal side effects-low grade fever low grade fever (Monday 100.1, Tuesday 101.2, and Wednesday 100.3); This spontaneous case was reported by a consumer and describes the occurrence of ACNE (pimples along her hairline which looked more like a chickenpox type rash spreading down her neck and left arm.), DERMATITIS ACNEIFORM (pimples along her hairline which looked more like a chickenpox type rash spreading down her neck and left arm.), ABDOMINAL PAIN (abdominal pain), ABDOMINAL PAIN UPPER (stomach cramps) and VACCINATION SITE MASS (swollen lump) in a 28-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 030H21B) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     Previously administered products included for Product used for unknown indication: Pfizer vaccine (first dose.) on 07-Apr-2021 and Pfizer vaccine (second dose.) on 28-Apr-2021. Past adverse reactions to the above products included No adverse event with Pfizer vaccine and Pfizer vaccine.    On 06-Dec-2021, the patient received third dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 06-Dec-2021, the patient experienced ABDOMINAL PAIN (abdominal pain), ABDOMINAL PAIN UPPER (stomach cramps), VACCINATION SITE MASS (swollen lump), VACCINATION SITE RASH (red rash at the injection site), NAUSEA (nausea), HEADACHE (headache) and PYREXIA (normal side effects-low grade fever low grade fever (Monday 100.1, Tuesday 101.2, and Wednesday 100.3)). On 07-Dec-2021, the patient experienced ACNE (pimples along her hairline which looked more like a chickenpox type rash spreading down her neck and left arm.), DERMATITIS ACNEIFORM (pimples along her hairline which looked more like a chickenpox type rash spreading down her neck and left arm.) and RASH (whole body rash/chickenpox type rash). On 08-Dec-2021, the patient experienced RASH (rash spread down her back and right arm). On an unknown date, the patient experienced RASH (rash continued to spread down her back to her left leg, to her right arm, right hand, and right side of her face.). The patient was treated with PREDNISONE on 08-Dec-2021 for Adverse event, at a dose of 40 mg and CLARITHROMYCIN (CLARITIN [CLARITHROMYCIN]) for Adverse event, at an unspecified dose and frequency. On 07-Dec-2021, ABDOMINAL PAIN (abdominal pain), ABDOMINAL PAIN UPPER (stomach cramps), NAUSEA (nausea) and HEADACHE (headache) had resolved. On 08-Dec-2021, PYREXIA (normal side effects-low grade fever low grade fever (Monday 100.1, Tuesday 101.2, and Wednesday 100.3)) had resolved. At the time of the report, ACNE (pimples along her hairline which looked more like a chickenpox type rash spreading down her neck and left arm.), DERMATITIS ACNEIFORM (pimples along her hairline which looked more like a chickenpox type rash spreading down her neck and left arm.), VACCINATION SITE MASS (swollen lump), RASH (whole body rash/chickenpox type rash), RASH (rash spread down her back and right arm), RASH (rash continued to spread down her back to her left leg, to her right arm, right hand, and right side of her face.) and VACCINATION SITE RASH (red rash at the injection site) outcome was unknown.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On 06-Dec-2021, Body temperature: 100.1 (High) Low grade fever of 100.1. On 07-Dec-2021, Body temperature: 101.2 (High) Low grade fever of 101.2. On 08-Dec-2021, Body temperature: 100.3 (High) Low grade fever of 100.3.         No concomitant medications reported. The patient also reported allergy medications and topical steroid as treatment medications  Patient  went to an urgent care where they instructed her to continue taking the prednisone but also gave her a topical steroid. She has a dermatologist appointment next week on Wednesday. She has also been taking her normal allergy medication and Claritin every day, but no other treatments.