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

As opposed to Attack of Cold, another pattern of the Greater Yang stage, there is an emphasis on Wind rather than Cold.

As far as symptoms are concerned, the aversion to cold is 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 same obstruction in the space between skin and muscles leads to the symptom of mild sweating as the deficient Nutritive Qi fails to hold sweat in place.

The slight fever 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.

Lastly the occipital headache and stiff neck are caused by the obstruction of Qi in the Greater Yang channels of Small Intestine and Gallbladder. These channels pass through the neck and head, hence the symptoms.