Post COVID-19 Conditions

Cacosmia in the Aftermath of COVID-19: When Familiar Scents Turn Foul

The unfolding narrative of COVID-19 continues to reveal an array of surprising and often distressing symptoms. While loss of smell and taste have been widely reported, another olfactory disturbance has come to light — cacosmia. For those afflicted, the world of scents turns upside-down, transforming once-pleasant aromas into something repellent.

Decoding Cacosmia

Cacosmia refers to a condition where ordinary smells, which are typically perceived as neutral or even pleasant, are suddenly and jarringly experienced as foul or offensive. It’s not just an alteration; it’s a distortion that paints everyday life with a disagreeable palette.

The Link Between Cacosmia and COVID-19

As researchers and medical professionals delve deeper into the varied manifestations of COVID-19, cacosmia has emerged as a concerning post-viral symptom:

  1. Olfactory Disruption: The virus’s impact on the olfactory system is evident, with anosmia (loss of smell) and agnosia (inability to recognize smells) already established as symptoms. Cacosmia further exemplifies the virus’s capacity to disrupt olfactory function.

  2. Mechanism of Onset: While the exact cause remains a topic of investigation, it’s believed that COVID-19 may cause damage or changes to the olfactory receptors or the brain areas that interpret scents.

  3. Duration and Recovery: The duration of cacosmia post-COVID varies among individuals. While some may experience brief episodes, others face prolonged discomfort. The path to recovery is still under exploration, but many find gradual improvement over time.

Navigating a World Distorted by Cacosmia

The implications of cacosmia in daily life are profound:

  • Emotional Strain: Constantly encountering foul odors can lead to feelings of revulsion, anxiety, or depression. The world, as perceived through smell, becomes a less welcoming place.

  • Impact on Diet: Foods that once were staples might now emit an off-putting aroma, leading to reduced appetite or aversion to certain meals.

  • Social Implications: Engaging in social activities or public spaces can become challenging when surrounded by scents that are perceived as nauseating.

  • Coping Strategies: Some individuals find relief by avoiding known triggers or using nasal saline rinses. Engaging in olfactory training, where one regularly exposes themselves to various scents, might also help recalibrate the sense of smell over time.


Cacosmia, with its disorienting and often distressing effects, underscores the multifaceted and sometimes unexpected challenges faced by those recovering from COVID-19. As the global community strives to understand the full scope of the virus’s impact, there remains hope that with time, research, and shared experiences, effective solutions will emerge to help those suffering find their way back to a world that smells as it should.

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