For the most part, essential oils won’t hurt your child. But that they have zero medical efficacy, and will not treat or cure any illness.
Unfortunately, parents sometimes use essential oils in place of actual medicine, whether it’s therapy or medication. In many cases, I’m sure it has more to do with lack of access to healthcare than anything, but still, being fleeced out of money for a dilute bottle of pennies’ worth of plant oil is still distasteful.
If rolling coconut oil on the soles of your feet cured indigestion or an upset stomach (yes, that’s actually how they tell you to use this product) we’d all be doing it, and prescription coconut oil would be available behind the counter at the pharmacy. There’s no way pharmaceutical companies would let this get away. Coconut oil would be patented, and the bottles would cost a hundred dollars each, unless you were lucky enough to have full-coverage insurance, in which case you’d get them for a co-pay of only twenty.