The waist area of the body is called Kati. Vasti in Kativasti implies a container. Kativasti is an effective therapy of Ayurveda for Katisula, which is the term for lower backache or stiffness or pain felt down the back.
In this treatment the patient is made to lie face down on the Droni and a rectangular reservoir made of black gram dough is built up on the lower back, around the lumbo-sacral area. And lukewarm medicinal oil, that alleviates pain and strengthens the bone tissues, is slowly poured into it.
For severe conditions of Sciatica and osteo-arthritis of the hip, the latter condition characterized by severe pain radiating down the leg, a combination of palliative and eliminatory measures is necessary to prevent a relapse.