The first whiff of rain is a gentle reminder by nature that the monsoon has arrived. Accompanying the drizzles is an earthy scent that often makes us nostalgic. Known as ‘petrichor,’ the heady fragrance is produced when the tiny water droplets hit dry soil on a warm day.
But did you know that this damp soil scent is actually the smell of a molecule (geosmin), produced by a bacterium called Streptomyces. As you smell it, you feel a serotonin rush in your body, changing your mood in an instant. According to experts, the smell of ‘petrichor’ has a calming effect on many people due to the soothing sound of falling water and the change in atmosphere it creates.
So, does it mean that rain makes people happier?
Arpita Kohli, Psychologist at Delhi’s Psri Hospital, told the indianexpress.com that the rhythmic sound of rain can reduce stress, promote relaxation, and even help with better sleep. For some, rain triggers nostalgia or comfort, reminding them of peaceful times, which can lift their mood.
“Scientifically, the negative ions in the air after rainfall are believed to increase serotonin levels in the brain, a chemical linked to happiness and emotional balance,” explained Kohli.
This explains why some individuals feel refreshed and mentally lighter after rain.
Petrichor is an earthy scent produced when rain falls on dry soil. (Photo: Freepik)
And what are the health benefits of petrichor?
The scent has subtle benefits for emotional well-being, shared Kohli. While petrichor may not have direct physical health benefits, its psychological impact can indirectly support mental health by promoting relaxation and comfort.
“It often induces a sense of calm and relaxation, reducing anxiety and mental fatigue. For many, the smell of petrichor is associated with renewal, freshness, and relief after long periods of dryness or heat.” Such associations can positively influence mood, acting as a natural stress reliever.
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Can we then use petrichor for various aromatherapies?
Kohli elaborated that petrichor is not commonly bottled or used in standard aromatherapy practices like lavender or peppermint; its calming properties align well with aromatherapy goals.
“Some researchers and wellness practitioners suggest that recreating or simulating earthy scents similar to petrichor may be beneficial in stress reduction therapies. Aromatherapy uses scents to trigger relaxation, improve focus, or uplift mood, and the natural, earthy aroma of rain could serve a similar role.”
As pointed out by the psychologist, more exploration into capturing and utilising petrichor in therapeutic settings may open new avenues for natural mood-enhancing treatments.
DISCLAIMER: This article is based on information from the public domain and/or the experts we spoke to. Always consult your health practitioner before starting any routine.