It should come as no surprise that lavender is one of the best essential oils to use for allergies. It is a very relaxing and balancing essential oil and is even useful for inflammatory issues. It is beneficial to use when dealing with hives or rashes, headaches, vertigo, congestion, and even coughs. In fact, most allergy symptoms would benefit from the use of lavender! Its properties are enhanced when combined with other essential oils, so it is ideal to use it in an allergy-fighting blend.