Graft Versus Host Disease (GVHD) is a significant and potentially life-threatening complication that can arise after an allogeneic hematopoietic stem cell transplant (HSCT). This condition occurs when the donor\'s immune cells attack the tissues of the recipient, which often results from immunological incompatibilities between the donor and recipient. GVHD is categorized into acute and chronic forms, each presenting with unique clinical features and long-term effects.