Which specific physical discomfort, aside from general fatigue, points to a sluggish liver function?

Unexplained nausea or a feeling of fullness in the upper right abdomen

The liver is the primary organ responsible for the chemical conversion required for detoxification, and when it struggles to keep pace with the influx of substances, its distress can manifest through localized and systemic physical symptoms beyond generalized fatigue. When the liver becomes sluggish, one specific indicator is the presence of unexplained nausea that is not related to immediate food intake. Another more localized sign is the physical sensation of fullness or heaviness in the upper right quadrant of the abdomen, which corresponds anatomically to the location of the liver. Persistent bad breath that cannot be resolved through diligent oral hygiene is also cited as a potential sign that the liver's processing capacity is compromised, leading to the presence of certain volatile compounds.