Yes, Calendula oil can be used directly on the skin. When using calendula oil on the skin, it is generally safe for most people, but it's always a good idea to perform a patch test first to check for any allergic reactions or sensitivity. To do a patch test, apply a small amount of calendula oil to a small area of your skin, such as the inside of your forearm. Wait for 24 hours and observe if there are any adverse reactions, such as redness, itching, or irritation. If there are no negative reactions, it is likely safe for you to use on a larger area of your skin