Whether or not you can use tea tree oil during pregnancy depends on which trimester you’re in.
Because of the marked stages of fetal development that occur in each trimester, the use of certain herbal supplements or remedies can be specific to a certain period of gestation. It’s generally recommended to avoid using essential oils like tea tree oil until you hit week 27, when your baby has surpassed many of these developmental milestones.
Whether you’re using tea tree oil during pregnancy or not, always remember to dilute the essential oil. Pure tea tree oil might cause some skin irritation.