I have certain soaps labelled "Not for use on sensitive skin" right on the label. For everything else I include a little card that has "Common Sense Cautions" on one side and why to choose handmade soap on the other side.
Here are my cautions...
COMMON SENSE CAUTION
Please use caution and common sense when using our products
~Keep products out of your eyes and other sensitive areas
~Use on a small area of skin first, if irritation occurs, discontinue use
~Please read ingredients carefully, especially if you have allergies or sensitive skin
~Although these products are made with natural ingredients, please DO NOT EAT
We are sure you will enjoy using our products
Thank you for your purchase