Diagnosis of tissue injuries often involves a combination of histological staining techniques, immunohistochemistry, and molecular methods. Staining techniques, such as Hematoxylin and Eosin (H&E), can highlight cellular and tissue architecture. Immunohistochemistry can be used to identify specific cellular markers, providing insights into the types of cells involved in the injury response. Molecular methods, including PCR and sequencing, can identify infectious agents or genetic mutations associated with tissue damage.