In the ancient period Indian saints handled the plants and herbs for long life with better health and lived  more than thousand years of age.  The sages were called Rishis in the North and Siddhars in the South and their systems were known as Ayurveda and Siddha.

       According to Siddha predictions, it is known to the world that Lord Siva taught the Siddha principles and philosophies to Matha, Sri Parasakthi.  After that the Siddha principles were presented to the followers of Lord Siva and Sakthi, to Siddhars, starting with Siddhar - Nantheesar, then to Siddhar Thirumoolar, Agathiyar and other disciples along with the 18 Siddhars and so on.  When we go through the Tamil Literature, we can see several Siddhars like Agathiyar, Tholkappiyar etc.  All the Siddhars adopted the principles of Saiva Siddhantham. It is an excellent philosophical theory to human beings with holy life.  In all Siddhars, Agathiyar was considered the  prominent leader with his later guru Lord Subramaniyar. From the old Siddha literature we can understand that Siddhar - Agathiyar was first taught by Lord Siva, Sakthi and later by Lord Subramaniyar.  Along with him we have Siddhars like Sattanathar, Korakkar, Kaalangi, Pulasthiyar, Theraiyar, Pulippani, Bogar, Konganavar, Machamuni and so on.  All the Siddhars taught their principles along with their well experienced medicines to their disciples under Gurugulavasa . They brought the secrets in the palm leaves manuscripts with several code words for their understandings. In later stages, those code words were not clear and were not known to the next generations except the followers of hereditary and traditional people of Siddha medicines.  Most of their predictions are classified with several formulations which could be followed and adopted according to the land, climate, age, severity of the disease food and circumstances.

        In general, single and even compound medicines are advised for the patients by knowing the pulse diagnosis methods, the variations of Naadi in their hands by means of  Vali, Azhal, Aiyyan, or in other words called Vaatham, pitham and kapam, respectively.  These three vital forces of cosmic elements are named under Three Thosham, or Mukkuttram and this is activated by the functions of Punchaboothas. The five major concept of Punchaboothas, are named as Nilam, Neer, Neruppu, Kattru and Veli,  which are respectively in hands known as Prithivi, Appu, Theyu, Vayu, and Akash.  According to this theory, all the substances in the universe are created under the actions or reactions of the Punchaboothas' functions only. Even for disease also, disease occurs in the living objects (body) by means of less quantity of the ratio of the Punchaboothas only.  If the ratio differs from one to another any disease may attack the body (human beings, animals, birds, flies etc.) by the way of the deficiency of certain vitamins and minerals.  Now a days several or some medicines affect the body and stimulate the curiosity of the disease to create another disease,  this is also caused by the differentiation in the ratio of the Punchaboothas functions.  Siddhars in olden days followed and adopted the principles for preparing all medicines like herbal, minerals and metals.  They cautioned the administration of certain Basmas, and Sinduras, which are well oxidised stages of metals and minerals, and advised for intaking periods, diet restrictions, according to the age, climate and land etc.

       Siddhars classified the diseases in different topics and accounted the total diseases for human body as 4448 diseases.  They mentioned about the curable and incurable  diseases along with the symptoms of the body and predicted the concerned, proper medicines also.

       Siddhars' thoughts are derived to the medicines for curing toughest and chronic diseases like, cancer, brain tumours, blood cancer, cordiac diseases, Rheumatoid Arthritis, oesteo Arthritis etc.  All the Siddha preparations are doing wonders from patient to patient with better ailments.

       Now a days the trained traditional Siddha practitioners are doing well, even with the old highest proficiency processes which were kept by their ancestors and some people make challenges with other systems for healing and curing  AIDS like diseases.  Generally with this system several processes are there to improve the Haemoglobin as well as the immunisation of the AIDS patients without any side effects.  More and more herbal preparations are predicted from one Siddhar to another with different kinds of Herbals. Very simple Herbal processes are advised by the Siddhars for the diseases like migraine, Sinusitis, Hypertension, Diabetes Mellitus, Gynaecological disturbances,  Leucoderma and psoriasis, Asthmatic attacks, piles and pistula, Rheumatisms, Dental problems  etc.  Siddha system of science is the most effective, valuable system for the human beings in all occasions without any side effects.  Everybody  can follow Siddha system of medicine even for the whole  family and even for the entire earth in all circumstances.  Siddha System of Science is an everlasting principle to the world.

       Siddha System presents the slogan, "Food is being medicine and medicine is being food"  to people.