| Light Microscopic Finding | Age of Scald Injury | |||
| Group II after 2 Days | Group III after 7 Days | Group IV after 1 Month | Group V after 3 Months | |
| Destruction of Adnexal Structures | + | ++ | + | + |
| Ulceration in the Epidermis | + | ++ | + | − |
| Inflammatory Infiltrate in the Dermis | ++ | +++ | − | − |
| Deposition of Multiple Collagen Layers | − | − | ++ | +++ |
| Re-epithelialization | − | − | + | +++ |
| Multiple Cell Islands | − | − | ++ | ++ |
| Epithelial Cell Migration to the Scald | − | − | + | ++ |
| TNF-α Immunoexpression | +++ | ++ | − | − |