 This study examined the electroencephalogram, e.g., patterns of patients with chronic pylonephritis and colisostitis during their stay at a spa resort. The results showed that these patients had distinctive e.g. patterns compared to healthy individuals. These patterns included higher levels of blood pressure, lower levels of delta rhythms, and higher levels of theta rhythms in certain areas of the brain. Additionally, the study found that the e.g. patterns changed over time, becoming more similar to those of healthy individuals after seven to ten days of treatment. This suggests that the spa treatments may have helped reduce the stress associated with the illnesses. This article was authored by Natalia Koziavkina, Yulia Vavchina, Natalia Voroniksymchenko, and others.