EnjoyingHerbs.com

Make your own herb oils.  What is the antiseptic value of herbs?  There are many, and we will explore them on other posts. 
Place herbs of your choice and research for certain uses and ailments in glass jars for each use or purpose.   The glass jar needs to have a tight-fitting lid.  Cover the herbs with olive oil [...]

Many ingredients of herbs are absorbed easily through the skin, making many herbs good for some ailments.
Herbal Baths:

Add a couple of drops of essential oil to the water
Hang a muslin bag or clean sock with fresh or dried aromatic herbs under the hot tap
Add strrong herbal infusions or decoctions to the bath wter, and soak [...]