1. What are essential oils? Essential oils are highly concentrated natural aromatic substances extracted from plants, which have strong aroma and therapeutic effects. They can be used by inhalation, massage or oral administration, and are widely used in areas such as body health, beauty and mood management. 2. Can pregnant women use essential oils? Using essential oils during pregnancy requires extreme caution. While many essential oils have great therapeutic properties, some of them may have adverse effects on the fetus. Therefore, pregnant women are advised to consult a doctor or professional aromatherapist before use. Three, which