Apply a small amount to clean skin and massage gently until absorbed. Cosmetic supplier guidance describes castor oil as a thick emollient commonly used in massage oils, creams, balms, and cleansing products.

For hair, massage a small amount into the scalp or apply lightly to the hair lengths, leave on for a short time, then wash if desired. Supplier usage guidance also includes scalp massage and hair-care use.

Do a patch test before first use. Avoid contact with the eyes, do not ingest it unless specifically directed by a medical professional, and stop use if irritation occurs. Cleveland Clinic notes that castor oil can irritate the skin and can cause eye problems if it gets into the eyes.