A 61-year-old man presented with the development of painful pigmented vesicles on the left side of the trunk, left hand, and arm. He was suffering from refractory idiopathic thrombocytopenic purpura and was on prednisolone therapy for a long time. He had mentioned that he had undergone a splenectomy 7 years ago. A day before this presentation, he had visited the clinic with the reports stating a sudden decrease in the platelet count.
The physician had increased his prednisolone dose for the same. From the above presentation, predict the cause of the painful vesicles. The correct answer is posted in the comment section. Source: The Lancet
