One of the more popular oils, Tea Tree has a fresh, spicy camphor scent that's cleansing and revitalizing. It is another must-have essential oil for every home first aid kit, as it is most commonly used to prevent infection and speed healing of minor cuts, scrapes, burns, bug bites, rashes, and other wounds. Tea Tree’s antioxidant and cleansing properties make it one of the best essential oils for skincare to help clear pores, regulate oil production, and improve the appearance of blemishes, scars, and age spots. It is reputed to be effective against nail bed fungus, dandruff, warts, and athlete’s foot. Tea Tree helps boost the immune system and can relieve respiratory conditions by clearing congestion and reducing inflammation and pain in the airways. It is the best essential oil to add to household cleaners and has been shown to control mold. It is also commonly added to deodorants, hand sanitizers, and natural insect repellents. Use in shampoos for a healthy scalp and to prevent lice.