OBJECTIVE: We aimed to evaluate the demographic, laboratory and radiological results of patients who applied to the emergency department due to renal colic (RC) during Ramadan.MATERIAL AND METHODS: This retrospective cross-sectional study included patients applied to emergency department (ED) with a diagnosis of RC during 2019 Ramadan and the 1 month preceding Ramadan. Age, sex, the hour of application, the results of urinalysis (erythrocyturia, leukocyturia, ketonuria, and urine density), presence of stones on radiological imaging and the location of the stone in the urinary system were recorded. The patients were grouped into three groups as the patients in the month preceding Ramadan (Group 1, n=83); patients fasting in Ramadan (Group 2, n=55); and patients not fasting in Ramadan (Group 3, n=37).RESULTS: Of the study population, 52.6% applied in Ramadan and 47.4% in the preceding month. There was no significant difference between the groups with respect to mean age, urinary leukocytes, urinary ketone, presence of stones and location of stones (p>0.05). Urinary erythrocytes were significantly lower in Group 3. The proportion of men and frequency of patients' admission between 16-24 hours in Group 2 was higher than the other groups. Urine density of Group 1 was found to be significantly lower than groups 2 and 3, but there was no difference between groups 2 and 3.CONCLUSIONS: It was found that fasting patients applied to the emergency department most frequently between the hours of 4 p.m. and 12 a.m. due to renal colic. Urinary erythrocytes were found significantly less in Group 3. In addition, we think that the high urine densities of the patients who applied during Ramadan are not related to fasting but to the increasing air temperature.