pain in his hands disappeared but now moved to the thighs,His thighs were painful,thighs were inflamed, pain moved to knee and legs, pain in feet; arms and biceps were swollen, thighs were swollen,His feet were swollen; his skin (entire body) started to peel off,The skin on his whole body was gone; his skin was very itchy; developed blisters all over the body; did not get a second shot; his whole body started to be inflamed, thighs were inflamed; could not shower for a few days; Rash,also given Prednisone for 2 weeks for the rash; skin test diagnosed him with Bullous pemphigoid; his neck got worse,he could not turn his head; his neck was swollen.; did not sleep well.; experienced stiffness in his neck; This spontaneous case was reported by an other health care professional and describes the occurrence of PEMPHIGOID (skin test diagnosed him with Bullous pemphigoid) in a 49-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 028L20A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     No Medical History information was reported.    On 20-Jan-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 01-Feb-2021, the patient experienced MUSCULOSKELETAL STIFFNESS (experienced stiffness in his neck). On 11-Feb-2021, the patient experienced INSOMNIA (did not sleep well.). On 15-Feb-2021, the patient experienced MUSCULOSKELETAL DISCOMFORT (his neck got worse,he could not turn his head) and SWELLING (his neck was swollen.). On 16-Feb-2021, the patient experienced PEMPHIGOID (skin test diagnosed him with Bullous pemphigoid) (seriousness criterion medically significant), PAIN (pain in his hands disappeared but now moved to the thighs,His thighs were painful,thighs were inflamed, pain moved to knee and legs, pain in feet), PERIPHERAL SWELLING (arms and biceps were swollen, thighs were swollen,His feet were swollen), SKIN EXFOLIATION (his skin (entire body) started to peel off,The skin on his whole body was gone), PRURITUS (his skin was very itchy), BLISTER (developed blisters all over the body), INTENTIONAL PRODUCT USE ISSUE (did not get a second shot), INFLAMMATION (his whole body started to be inflamed, thighs were inflamed), IMPAIRED SELF-CARE (could not shower for a few days) and RASH (Rash,also given Prednisone for 2 weeks for the rash). The patient was treated with PREDNISONE for Adverse event, at a dose of 1 dosage form; ACETAMINOPHEN for Adverse event, at a dose of 1 dosage form; IBUPROFEN for Adverse event, at a dose of 1 dosage form; DOXYCYCLINE for Adverse event, at a dose of 1 dosage form; MESALAMINE for Adverse event, at a dose of 1 dosage form; CLOBETASOL PROPIONATE (CLOBETASOL [CLOBETASOL PROPIONATE]) (topical) for Adverse event, at a dose of 1 dosage form and HYDROXYZINE for Itching, at a dose of 1 dosage form. At the time of the report, PEMPHIGOID (skin test diagnosed him with Bullous pemphigoid), MUSCULOSKELETAL STIFFNESS (experienced stiffness in his neck), INSOMNIA (did not sleep well.), MUSCULOSKELETAL DISCOMFORT (his neck got worse,he could not turn his head), SWELLING (his neck was swollen.), PAIN (pain in his hands disappeared but now moved to the thighs,His thighs were painful,thighs were inflamed, pain moved to knee and legs, pain in feet), PERIPHERAL SWELLING (arms and biceps were swollen, thighs were swollen,His feet were swollen), SKIN EXFOLIATION (his skin (entire body) started to peel off,The skin on his whole body was gone), PRURITUS (his skin was very itchy), BLISTER (developed blisters all over the body), INTENTIONAL PRODUCT USE ISSUE (did not get a second shot), INFLAMMATION (his whole body started to be inflamed, thighs were inflamed), IMPAIRED SELF-CARE (could not shower for a few days) and RASH (Rash,also given Prednisone for 2 weeks for the rash) outcome was unknown.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): In 2021, Skin test: abnormal (abnormal) Skin test diagnosed him with bullous pemphigoid..     mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) was withdrawn on an unknown date.   For mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular), the reporter did not provide any causality assessments.   No concomitant medications were reported.  It was noted that the patient was being treated by a dermatologist. A "skin test" was completed and results indicate a diagnosis of bullous pemphigoid.   It was advised that the patient not receive the second dose of the vaccine.  Company Comment : Very limited information regarding these events has been provided at this time. Additional information required.; Sender's Comments: Very limited information regarding these events has been provided at this time. Additional information required.