What precautions are necessary when using oils that can be skin irritants or sensitizers?

Perform a skin test (patch test)
Before first use, apply a small amount of oil to a small area on the inner arm or behind the ear. Observe for 24-48 hours to ensure no redness, itching, or other reactions occur before full application.

Dilute before use
Mix potentially irritating oils (e.g., essential oils) with a mild carrier oil (such as jojoba oil, sweet almond oil, or coconut oil). Essential oil concentration should generally not exceed 1-2% to reduce the risk of skin irritation.

Avoid sensitive areas
Do not apply near the eyes, on mucous membranes, broken skin, inflamed areas, or allergy-prone zones (e.g., neck) to prevent increased irritation or allergic reactions.

Understand ingredients and concentration
Carefully read product labels to avoid oils containing known allergens (e.g., cinnamon, clove essential oils, or artificial additives). Follow recommended usage concentrations and avoid arbitrarily increasing dosage.

Control frequency of use
Limit application frequency (e.g., 1-2 times per week). Avoid continuous use to allow skin adequate recovery time and reduce cumulative irritation risks.

Consult professionals
If you have sensitive skin, allergy history, or are using other skincare products, consult a dermatologist or aromatherapist before use for personalized advice.

Note storage conditions
Store oils in a cool, dark, and dry place. Avoid high temperatures or direct sunlight to prevent oxidation and increased irritancy.

Recognize and address allergic reactions
If redness, burning, itching, or rashes occur during use, immediately discontinue application. Cleanse skin with mild soap and water. Seek prompt medical attention for severe reactions and provide product ingredient information.