Written by: Therapy Near Me Editorial Team
Clinically reviewed by: qualified members of the Therapy Near Me clinical team
Last updated: 26/09/2025
This article is intended as general information only and does not replace personalised medical or mental health advice. Learn more about our Editorial Policy.
Introduction
Aromatherapy is the therapeutic use of essential oils extracted from plants to promote psychological and physical wellbeing. Although historically linked to ancient practices in Egypt, China, and India, modern aromatherapy is supported by a growing body of scientific evidence examining its effects on stress, anxiety, depression, and sleep quality (Lee et al., 2011).
This article explores how aromatherapy works, its mental health applications, and the evidence behind its effectiveness, research-based perspective for readers seeking natural approaches to emotional wellbeing.
1. What is aromatherapy?
Aromatherapy uses volatile plant compounds—such as lavender, peppermint, or eucalyptus oils—through inhalation, massage, or bathing. These essential oils contain active molecules that interact with the olfactory system and can also be absorbed through the skin, potentially influencing mood, hormone regulation, and immune function (Buckle, 2015).
2. The science of scent and the brain
Odour molecules stimulate receptors in the nasal cavity, sending signals to the olfactory bulb, which connects directly to the amygdala and hippocampus—key brain areas for emotion and memory. This direct pathway explains why smells can trigger powerful feelings and memories (Herz & Engen, 1996). Through these mechanisms, essential oils can modulate the release of neurotransmitters such as serotonin and dopamine, which influence mood and stress responses (Lis-Balchin, 2006).
3. Mental health benefits of aromatherapy
a) Stress and anxiety reduction
Several clinical trials report that inhaling lavender, bergamot, or chamomile oil reduces physiological stress markers such as heart rate and blood pressure (Lee et al., 2011; Seifi et al., 2014). Aromatherapy massage has also shown beneficial effects for hospital patients and people with chronic illness.
b) Improved sleep quality
Lavender and cedarwood oils are commonly used to improve sleep. Randomised controlled trials demonstrate enhanced sleep efficiency and reduced insomnia symptoms (Hwang & Shin, 2015).
c) Mood enhancement and depression relief
Citrus-based essential oils, including orange and lemon, have been linked to improved mood and reduced depressive symptoms, potentially by stimulating serotonin production (Komori et al., 1995).
d) Cognitive performance
Peppermint and rosemary oils may enhance alertness, working memory, and mental clarity, although findings are mixed (Moss et al., 2008).
4. Clinical applications and settings
Aromatherapy is integrated into diverse clinical contexts:
- Complementary therapy in hospitals to reduce preoperative anxiety.
- Palliative care for stress management and comfort.
- Mental health counselling as an adjunct to psychotherapy, particularly for stress-related disorders.
It is generally used as a complementary approach, not a substitute for professional mental health treatment.
5. Safety and best practices
While generally safe, essential oils must be used carefully:
- Dilute oils to avoid skin irritation.
- Avoid ingestion unless under professional supervision.
- Keep oils away from children and pets.
Consult a healthcare provider before using essential oils if you are pregnant, have asthma, or take medications (Buckle, 2015).
6. Cultural and holistic perspectives
Aromatherapy resonates with holistic traditions, emphasising mind-body balance. Different cultures highlight different oils: sandalwood in Indian Ayurveda, eucalyptus in Australian Aboriginal practices, and green tea in East Asia. Such diversity reflects the universal human response to scent and its role in emotional healing.
7. Practical tips for everyday use
- Home diffuser: Add a few drops of lavender or citrus oil to a diffuser to create a calming atmosphere.
- Stress-relief bath: Combine chamomile and bergamot oils with Epsom salts for relaxation.
- Work focus booster: Use peppermint or rosemary oil in a diffuser for mental alertness during work or study.
FAQs
Q: How does aromatherapy reduce stress?
By stimulating olfactory pathways linked to mood regulation and reducing physiological stress responses.
Q: Which essential oils are best for anxiety?
Lavender, chamomile, and bergamot are most frequently cited for their calming effects.
Q: Can aromatherapy treat depression?
It can complement other treatments by enhancing mood and reducing mild depressive symptoms, but it is not a stand-alone therapy.
Q: Is aromatherapy scientifically proven?
Growing evidence supports its benefits for anxiety, stress, and sleep, although results vary and more large-scale studies are needed.
References
- Buckle, J. (2015) Clinical Aromatherapy: Essential Oils in Healthcare. 3rd edn. St. Louis: Elsevier.
- Herz, R.S. & Engen, T. (1996) ‘Odor memory: Review and analysis’, Psychonomic Bulletin & Review, 3(3), pp. 300–313.
- Hwang, E. & Shin, S. (2015) ‘The effects of aromatherapy on sleep improvement: A systematic literature review and meta-analysis’, Journal of Alternative and Complementary Medicine, 21(2), pp. 61–68.
- Komori, T., Fujiwara, R., Tanida, M., Nomura, J. & Yokoyama, M.M. (1995) ‘Effects of citrus fragrance on immune function and depressive states’, Neuroimmunomodulation, 2(3), pp. 174–180.
- Lee, M.S., Choi, J., Posadzki, P. & Ernst, E. (2011) ‘Aromatherapy for health care: An overview of systematic reviews’, Maturitas, 71(3), pp. 257–260.
- Lis-Balchin, M. (2006) Aromatherapy Science: A Guide for Healthcare Professionals. London: Pharmaceutical Press.
- Moss, M., Hewitt, S., Moss, L. & Wesnes, K. (2008) ‘Modulation of cognitive performance and mood by aromas of peppermint and ylang-ylang’, International Journal of Neuroscience, 118(1), pp. 59–77.
- Seifi, Z., Tansaz, M. & Mosavat, S.H. (2014) ‘Aromatherapy in anxiety disorders: A review of the scientific evidence’, Iranian Journal of Psychiatry and Behavioral Sciences, 8(4), pp. 2–7.
