Bergamot oil is originally from Italy. It is obtained from the rind of the bitter orange. It has a pale green colour.
The fragrance is sharp, orangey and refreshing. It is a happy, uplifting oil.
As the initial sharp notes fade, it leaves a lingering scent similar to neroli.

Bergamot is recommended by some aromatherapy authors for vaginal itching and cystitis.
For such purposes, use it in a wash diluted to 0.5%.

It works well against tension headaches. A friend of mine used to suffer from terrible headaches.. Then she tried diffusing the oil in her room. She also massaged the diluted oil on the temples of her head. It worked wonders against her headache.

It is one of the traditional antiviral oils. It is said to inhibit the Herpes virus. It is also used by some people
to relieve chicken pox and shingles.

A word of caution though: Bergamot is a photosensitiser.
It contains bergaptene and bergamotine. According to Daniele Ryman in the book 'Aromatherapy. The Complete Guide to Plant and Flower Essences for Health and Beauty' These can cause over pigmentation on the skin when exposed to sunlight.
They can also provoke abnormalities that can degenerate.

This photosensitising effect can last a few days. So if you are using the oil, avoid the sun for at least 3 days after that.