1. Because the bedroom doors and windows are closed at night, the air is not circulating. If the concentration of aroma volatiles in aromatherapy is too high, inhaling too strong aroma for a long time will be harmful to health.

2. Things like aromatherapy have certain effects on different people in different fragrance types. If you feel allergic or uncomfortable after use, you should stop using it in time. If you stop using it, your physical condition will improve, so you should avoid touching this kind of things in the future, because your body may have allergies.

3. Even the best aromatherapy and other things that test the respiratory system cannot be used for a long time, otherwise it may cause damage to people's respiratory system and heart function.

4. If an individual has physical problems such as rhinitis, heart, respiratory tract and blood pressure, use it with caution.