This is one of the four patterns of the Greater Yang stage, the third stage of the Six Stages theory.

In this pattern, on top of being in the Exterior, the External Pathogen has invaded the Bladder.

Symptoms of the Exterior attack include the aversion to cold due to the obstruction of the space between the skin and muscles by Wind: this impairs the circulation of Defensive Qi which cannot fulfill its function of warming the muscles.

The fever is also characteristic of the presence of a Pathogen in the Exterior. Please note that it is not necessarily an actual fever but more the hot feeling of the patient’s skin on palpation, what the Chinese call "heat emission" of the skin.

As for the Bladder invasion, it results in Water not being transformed. This causes retention of urine, thirst and vomiting after drinking.

Concretely when Water isn't transformed in the Bladder, the fluids aren't ascending, which causes thirst. But because the thirst isn't due to a deficiency of fluids, it isn't relieved by drinking.

As for the vomiting, it is caused by the accumulation of Water in the Stomach since the Bladder doesn't process it correctly anymore.