At the Ròseo Euroterme Wellness Resort, thermal mud is obtained by placing virgin, natural, and extremely fine clay in special tanks called "fangaie" for at least 12 months. The clay is periodically mixed with continuous flow of thermal water to allow the maturation of the mud.

During this long period, the clay undergoes profound changes, enriching itself with the mineral salts contained in the hyperthermal water it has been soaked in. It also undergoes a biological process of organic substance enrichment through the development of a particular microflora (algae, molds, bacteria, and small protozoa). This results in the formation of "mature mud," which is heated in a water bath to 51°C and is ready for application.

Only mature mud is capable of providing analgesic and anti-inflammatory effects because, in addition to its local action on the muscles, it has a general effect on the adaptive capacity by releasing cortisol (the cortisone produced by our body), ACTH (a hormone that promotes increased cortisol production), and beta-endorphins (morphine produced by our body under stress conditions).

This warm mud is spread on the affected parts of the body affected by rheumatic diseases, and its temperature is maintained constant with the application of sheets and warm blankets. After this 20-minute thermo-absorption phase, a thermal water bath is performed to remove the mud and enhance the rehabilitative effect. Following the bath, in an adjacent changing room, the "reaction" phase occurs, during which abundant sweating takes place as a result of thermoregulation.