This is the pattern of the Lesser Yang stage, the third stage of the Six Stages theory.

At this stage the External Pathogen has penetrated to the level of the Gallbladder Channel.

Its main characteristic is that it's a stage that oscillates between the Bright Yang and Greater Yang stages and alternatively takes symptoms from both. Such oscillations are characteristic of diseases like malaria and typhoid fevers that show alternating heat and chills, and a cyclic recurrence of symptoms.

The chills, which can also be an aversion to cold, alternate with the fever, which can also be a mere feeling of heat. They aren't simultaneous.

Other symptoms are typical of the Gallbladder channel: bitter taste, dry throat, blurred vision, hypochondrial fullness and distension, irritability, nausea and vomiting.