Peppermint essential oil can be used to repel insects, add a few drops to small pieces of cotton. Place them in the closets and drawers.
To cure nausea, put 1-2 drops of Peppermint essential oil on a tissue paper and inhale.
If you have sinusitis, use as a steam inhalation. Add 1-2 drops of Peppermint essential oil to a bowl of steaming water to vaporize the oil and place a towel over your head and inhale in deep breathes.