The flower essences work on an emotional level in the body, aiming to balance negative emotions by transforming them into positive ones.

The remedies restore emotional balance before physical ailments appear.
There are a couple of theories as to how they work:
Theory 1: the flower remedies work by subtly changing the energy or vibration of the person.
Theory 2: the flower essences trigger neurotransmitters which affect the emotions.

Flower essences should always been diluted before they are taken, unless this has by been done by a practitioner before hand.