Prusík’s Spring springs up in the park where the glass spa pavilion now stands. Another place where you can taste the spring is the rotund pavilion near the terraces of the Hotel Prusík. The first references to Konstantinovy Lázně in connection with the local spring called Smraďák (Stinker) date back to the 16th century. Peasants from the surrounding area used to come to the pool with bubbling bluish water for refreshment in the hot summer, and many of them already knew the healing effects of this spring. Later on, the spring was named after Bohumil Prusík, M.D., a Prague professor of internal medicine and a great promoter of Konstantinovy Lázně.
The healing resources of Prusík’s Spring are used mainly in carbon dioxide baths and in the form of subcutaneous application of spring gas. During a carbon dioxide bath, carbon dioxide is absorbed through the skin, which causes the blood vessels to dilate and consequently blood pressure to drop and heart rate to decrease. Muscle blood flow and oxygenation are increased, so carbonic baths have a significant effect on the cardiovascular system and are also recommended for musculoskeletal disorders.