The current and recent development in indications for the thermal treatment is linked with certain characteristics of current therapeutics, the appearance of new clinical motives for prescribing the treatment, the quantitative and qualitative increase in the pathological symptoms known as "civilizational disorders", the extension of life-span and thus an increase in the number of sage-linked complaints. The author also mentions the time to be appointed for the treatment, its ultimately preventive nature, and the problem of indication with regard to age. Crenotherapy is still the treatment indicated in the case of the sequels to certain acute disorders, the initial period of chronic organic disorders, functional troubles, and morbid or allergic predispositions.