Even friendly oils can be troublemakers if used wrong. Never give essential oils internally to an infant. Not even if they make a funny face. Not even if a blog says it’s fine.
Watch for skin irritation—if their skin gets red or they seem more upset, wash it off with soapy water and try a different oil or skip it altogether.
Also, keep your oils in a high cabinet. Babies are like tiny detectives who will find anything you don’t want them to.