A 22-year-old man with systemic lupus erythematosus (SLE) presented with 2 weeks of a generalized rash and oral ulcers.The patient was diagnosed with SLE at the age of 3 based on malar rash, photosensitivity, oral ulcers, and arthritis, which were controlled with chronic low-dose corticosteroids and hydroxychloroquine. At the age of 18, the patient developed aseptic meningitis and acute left anterior uveitis; both were responsive to increased doses of corticosteroids. He did not follow up with a rheumatologist for approximately 4 years, during which time he took no medication until 4 months prior to admission when he experienced a lupus flare with malar rash, oral ulcers, fatigue, and neuropsychiatric symptoms including severe headache, distal paresthesias, slurred speech, and a subacute decline in mental status (difficulty concentrating, slowing thoughts, word finding difficulties, and memory loss). Laboratory testing at that time revealed a moderately high titer positive antinuclear antibody (ANA), in a coarse speckled pattern, and anti-double-stranded deoxyribonucleic acid (anti-dsDNA) antibody, normal levels of C3 and C4 and positive Ro (SS-A), Smith (Sm), U1-ribonucleoprotein, anticardiolipin immunoglobulin A (IgA) (42U), and Beta-2 glycoprotein-I IgA (57U) antibodies. The patient was treated with high-dose corticosteroids, started on hydroxychloroquine 200mg twice daily, aspirin 81mg, and esomeprazole 40mg once daily, with clinical improvement. Patient was subsequently tapered down on prednisone therapy accordingly from 60 to 40mg once daily regimen.Two weeks prior to admission at our institution, the patient developed new oral ulcers and generalized rash. The rash, which was minimally pruritic, initially appeared on his hands and arms, and then extended to his trunk and face, sparing his lower extremities and buttocks. Small painful vesicular lesions with serous discharge developed on his palms and fingers. His oral ulcers, initially discrete and small, became diffuse and painful and made it difficult for him to eat, as per patient's selfreport. He sought care at an emergency department at another institution where he was treated with intravenous valacycloir for possible disseminated herpes-simplex viral (HSV) infection and with vancomycin for a possible bacterial skin superinfection. Less than 24h there, the patient left against medical advice, and presented to our hospital the following day.The patient denied joint pain, neurological symptoms, fevers or chills, chest pain, shortness of breath, cough, diarrhea, constipation, dysuria, or hematuria. The patient had known allergies to penicillin and erythromycin, but no history of recent exposure to these drugs. His medications were prednisone 40mg alternating with 20mg daily, hydroxychloroquine 200mg twice daily, aspirin 81mg daily, and esomeprazole HSSJ