Ylang ylang oil is made from the flowers of the herb Cananga odorata genuina.People apply ylang ylang oil to the skin to promote relaxation, kill bacteria. It is also part of a combination spray used to kill head lice. The smell of ylang ylang oil in aromatherapy is used for memory and thinking skills.Lavender is an herb. The flower and the oil of lavender are used to make medicine. Lavender is commonly used for anxiety, stress, and insomnia. It is also used for depression, dementia, pain after surgery.