I found this information on 877MyJuicer.com
BEST ESSENTIAL OILS FOR HEADACHES
Lavender: this gentle, sweet-scented essential oil will help you relax, alleviating tension that brings on headaches. It’s also a favorite oil for use at night – sprinkle a few drops on your pillowcase for sweet dreams.
Peppermint: rich in menthol, this minty oil helps with tension and sinus headaches. It’s stimulating and energizing, so use it during the daytime.
Roman Chamomile: relaxing, anti-inflammatory, and sedative, Roman Chamomile essential oil is another great choice for before-bedtime headaches. Pair with a cup of chamomile tea, perhaps?
Eucalyptus: relieve a pounding sinus headache with eucalyptus essential oil, which is said to act as an anti-inflammatory agent.
When you’re suffering from a headache, it can feel great to massage a few drops of these essential oils into your temples, your forehead, and the back of your neck. Just make sure to dilute the essential oils with a “carrier oil” (a mild, fairly unscented oil such as grapeseed, jojoba, sweet almond, or olive oil), as essential oils are very powerful. Mix 10-12 drops of your chosen oil (6-8 drops if using eucalyptus or peppermint) into one ounce of carrier oil. Gently massage away the headache.
Put 1-3 drops of your chosen oil onto a cotton ball. If this is your first time using the oil, use one drop to make sure it doesn’t aggravate the headache. Hold the cotton ball beneath or near your nose and inhale steadily. Try to release all the tension in your neck and temples.
I always carry lavender oil with me. It is good for headaches, for bad smells (I rub it on the end of my nose, and, if the bad smell emanates from some person in the room, I just leave the bottle open in front of me). Lavender is also an antibiotic, so if I get a paper-cut or any other open-skin injury, I drag out the bottle and apply some. My flu remedy involves lavender and clove oils, but if I am away from home and clove oil, I’ll put about 3 drops of lavender oil in a cup of hot water and drink that if I feel a cold or the flu coming on).