Different effects may be accomplished by inhaling in either the right or left nostril. The olfactory nerves do not cross to the opposite side of the brain, therefore inhaling in the right nostril will have a different effect than when using the left nostril. It is important to use only essential oils, undiluted or adulterated with any other oil or substance. Try a little eucalyptus, lavender or pine oil. Peppermint or rosemary might bring a little relief.
Lavender is an old standby, as is rosemary or peppermint.
The scent will trigger the brain to release the endorphins, chemicals, etc. to help the condition you may be trying to treat. The following list is just a sample of different conditions and the oils that may be beneficial. As complete as this list may appear, this is only a sampling of the oils. There are many good books on the subject of Aromatherapy. I encourages you to educate yourself as much as possible.