Mild steam baths were often recommended by Edgar Cayce to increase elimination of toxins through the skin and lungs. This form of hydrotherapy is usually given in a steam cabinet. A substance (such as witchhazel) is added to the boiling water in the cabinet to produce a vapor which settles over the body and is absorbed through the pores in the skin. A hot and cold needle shower is typically used after the steam bath to cleanse the sweat and toxins from the skin. A massage is then given to further relax the body and assist with eliminations.

Therapists trained in the Cayce/Reilly approach to giving steam baths are knowledgeable regarding safeguards and contra-indications for this form of hydrotherapy. It is usually best to begin gently with little heat to make sure that the body can handle the treatment. Gradually, greater heat can used as the body is able to tolerate it.