One studyTrusted Source found that geranium essential oil was about as effective as amoxicillin at fighting bacterial strains, such as Staphylococcus aureus. The same study found that it was not effective at fighting Listeria monocytogenes, a different bacterial strain.
Certain neurodegenerative diseases like Alzheimer’s disease, multiple sclerosis, Parkinson’s disease, and amyotrophic lateral sclerosis (ALS) are associated with varying degrees of neuroinflammation.
A study found that high concentrations of citronellol, a component of geranium essential oil, inhibited nitric oxide production, reducing inflammation and cell death in the brain.
According to researchers, geranium essential oil might have benefits for people with neurodegenerative diseases that include neuroinflammation.
Menopause and perimenopause
A studyTrusted Source found that aromatherapy with geranium essential oil was beneficial at stimulating secretion of salivary estrogen.
Researchers theorized that geranium essential isf value for women experiencing reduced estrogen and health-related symptoms caused by menopause and perimenopause.
Stress, anxiety, and depression
Aromatherapy is becoming more and more mainstream, even in hospital settings. A randomized, clinical trialTrusted Source of women in labor for the first time found that inhaled geranium essential oil had a calming effect and was able to reduce the anxiety associated with first-stage labor.
Anecdotal evidence also suggests geranium essential oil may promote relaxation and alleviate depressive mood. One animal study on mice analyzed the calming, antidepressive effects of the Reunion geranium (Pelargonium roseum willd) essential oil strain, and found it to be effective for reducing stress.
Shingles often result in postherpetic neuralgia, a very painful condition affecting the nerve fibers and skin that run along a nerve.
One study found that topical application of geranium oil significantly reduced postherpetic neuralgia pain within minutes of application. These effects were temporary, and required reapplication as needed.
According to one preliminary studyTrusted Source, geranium essential oil’s citronellol content makes it potentially effective for reducing allergic reactions. However, more study is needed.
Anecdotal evidence suggests that topical use may reduce itching caused by allergic reactions. This is because of the anti-inflammatory action of this essential oil.
Anecdotal evidence suggests that geranium essential oil may be beneficial for stopping minor wounds from bleeding. It may do this by speeding up coagulation, and by causing blood vessels to contract. It’s antibacterial and antiseptic properties are also beneficial for healing.
Geranium essential oil has long been used in Tunisia as a folk remedy treatment to reduce hyperglycemia.