Basti chikitsa is an Ayurvedic panchakarma therapy that uses medicated oils or herbal decoctions administered via the rectum to expel toxins and vitiated doshas from the body. There are two main types of basti - anuvasana which uses oils and ghee, and niruha which uses herbal decoctions. Both types are administered in a structured process involving pre-treatment, administration, and post-treatment steps to maximize benefits which include detoxification, pain relief, and balancing metabolism.