Kaya Chikitsa or Internal medicine
The branch of Ayurveda which deals with internal medicine is called “Kaya chikitsa”, where Kaya means Agni and Chikitsa meanstreatment. Ayurvedic therapeutics is entirely based on this concept of Agni. The concept of Kaya (Agni) is very unique to Ayurveda. It is responsible for biotransformation. The energy required for all activities in our body is provided by Agni.. The energy can neither be created nor destroyed, but it can be converted from one form to another. Biological Kaya transforms the energy derived from the food and the air, to the energy which can be utilized by our cells. The vitamins, minerals, carbohydrates, fats etc. we eat, are converted by this Kaya to the bodily substances. As long as this Kaya is balanced, all the activities in body are performed smoothly. Any disturbance in this Kaya causes imbalance in the equilibrium and disturbs physiology leading to a disease. Ayurvedic therapeutics focuses on the restoration and maintenance of biological Kaya.
Charaka Samhita is the most important ancient text of Internal medicine. It imparts information on basic principles of treatment, various types of therapies, including the detoxification or purification methods, i.e., Panchakarma; elaborate information of diagnosis and various diagnostic methods, differential diagnosis along with the appropriate management of various diseases like diabetes mellitus, fevers, infectious diseases, arthritic conditions including the conditions like rheumatoid arthritis and osteoarthritis; asthma, tuberculosis etc.