Şaşmaz MI, et al. - The relationship between the severity of pain level and hydronephrosis, hematuria and pyuria presence in the acute renal colic attack was investigated. Further, researchers examined if the stone size is correlated to inflammatory markers. They evaluated 275 patients (Mean age: 41.0 ± 14.9; 61.1% male) regarding their pain scores determined by Visual Analog Scale, CRP, WBC and NLR levels from the laboratory results, hematuria and pyuria presence in the urine analysis and hydronephrosis presence in the imaging methods. Moreover, in patients who had computed tomography images available, the stone size was measured. Outcomes revealed no correlation of the pain level with the stone size; big stones were not identified as statistically riskier in the hydronephrosis development. However, it seems that the patients whose pain level is higher, are at higher risk of complications such as hydronephrosis and the infection may be accompanied by this group.