Reflexology is based on the principle that reflex points on the soles, tops, and sides of the feet correspond to different areas of the body. In this way, the feet can be seen as a ‘map’ of the body. Have a look at the interactive map.
Applied pressure point techniques are used on specific reflex points, using the thumbs, fingers and knuckles and if required a rosewood thai massage stick. Reflexology stimulates and aids the body's healing mechanisms, by improving circulation and nerve conduction. It aids and encourages the release of toxins via the lymphatic system. Balancing reflex points engages with the body's deepest inherent capacity for self healing.
Reflexology can help to relieve anxiety and tension, encourage relaxation, improve mood and aid sleep, though some people use it to help them cope with more specific health challenges. For the treatment itself you will remain fully clothed, simply removing your shoes and socks.
To get a better idea what reflexology is and looks like, watch this video from the Association of Reflexologists.