Step 1 → Musculoskeletal, Skin, and Connective Tissue Burns and Skin InjuryPreview this topic sectionPreview the conditions. Plans unlock the full Step 1 details when you need them. Free Biochemistry Free Microbiology Plans Burns and Skin Injury conditions Deep partial-thickness burn (Epidermis and reticular dermis) Deeper injury burn (Epidermis, dermis, underlying tissue) Full-thickness burn (Epidermis and full-thickness dermis) Sunburn Superficial burn (Epidermis only) Superficial partial-thickness burn (Epidermis and papillary dermis)