This pattern is characterized by Heat accumulating in the body's Yin (cooling) aspects, often during the later stages of a warm-heat pathogen disease. This condition arises when prolonged exposure to Heat pathogens depletes the body's Yin and Body Fluids.

Key manifestations include night fevers that diminish by morning, reflecting the Heat's concealment within the Yin aspects. A lack of sweating as fevers recede, despite the Heat, indicates depleted Yin and Body Fluids. The patient's maintained appetite suggests that the Qi level, particularly the digestive system, remains relatively unscathed.

The pattern is further indicated by general emaciation due to the overall loss of nourishment from Yin and Blood. This pattern is typically a result of extended illness or chronic exposure to heat, leading to a profound imbalance between the body's Heating and cooling elements.