This study investigated the relationship between self-reported stress and pain in Ukrainian women during the Russia-Ukraine conflict using data from the Flo health app. Analyzing data from 87,315 active users before and after the war's onset, researchers found an inverse relationship between stress and pain reports: higher stress correlated with lower pain reports. This effect was most pronounced in Ukraine and lessened in neighboring countries. The findings suggest stress-induced analgesia (SIA) in a real-world setting, although the researchers note the potential long-term detrimental effects of chronic stress.

Aliaksandr Kazlou, Kateryna Bornukova, Aidan Wickham, Vladimir Slaykovskiy, Kimberly Peven, Anna Klepchukova, Sonia Ponzo, Sarah Garfinkel