What is the main characteristic of 2nd degree Deep partial thickness burns?

The main characteristic of second-degree deep partial thickness burns is that they are painful and can develop blisters. These burns penetrate deeper into the skin than superficial partial thickness burns, affecting both the epidermis and part of the dermis. The damage to the nerve endings in the dermis is why pain is a significant symptom. The presence of blisters is also a hallmark of this type of burn, which occurs as fluid accumulates between the layers of skin as a protective response. This combination of pain and blister formation helps in distinguishing deep partial thickness burns from other burn classifications.