Which of the following is a feature of Heart Phlegm Fire?

Heart Phlegm Fire is characterized by an excess condition in traditional Chinese medicine (TCM) where phlegm accumulates in the heart due to excessive heat. This condition can lead to a range of symptoms, primarily affecting mental clarity and emotional stability.

Confusion is a key manifestation as the accumulation of phlegm can obstruct the clear spirit (Shen) from fully illuminating the heart, resulting in symptoms like mental fog, agitation, or even delirium. A swollen tongue typically reflects an internal dampness and heat, consistent with the presence of phlegm-damp accumulation in the heart. This physical sign aligns well with the overall diagnosis of Heart Phlegm Fire because the tongue can display a thick, greasy coating indicating excess.

Overall, the correct features of Heart Phlegm Fire are well captured by the symptoms of confusion and a swollen tongue, as they directly correlate with the underlying pathophysiological concepts in TCM regarding phlegm and heat disturbing the heart's functioning.