Essential oils can be used directly on the skin, but there are a few things to keep in mind:
1. Dilution: Unilateral essential oils are very concentrated and need to be diluted before use. It is usually recommended to mix a single essential oil with a carrier oil in a certain proportion, such as adding 1-3 drops of a single essential oil to 10 ml of carrier oil.
2. Sensitivity: Some people may have an allergic reaction to certain unilateral essential oils, so a skin test is required before use. Apply the diluted essential oil to the wrist or inner elbow and observe for any discomfort such as redness, swelling and itching.
3. Avoid contact with eyes and mucous membranes: Alone essential oils should not come into contact with the eyes and mucous membranes, otherwise it may cause irritation and pain.
4. Avoid sun exposure: Certain unilateral essential oils may increase your skin's sensitivity to UV rays, so you need to avoid sun exposure after use.
In conclusion, essential oils can be used directly on the skin, but attention needs to be paid to issues such as dilution, sensitivity, avoiding contact with eyes and mucous membranes, and avoiding sun exposure. It is recommended to understand and test before use to ensure that it is safe and effective.