The kidney may be affected in the processes of microbial, viral, parasitic infections. Knowledge of renal disease during chronic infection, with a different location than the throat, is of particular importance for the practicing physician for the detection and prevention of impaired renal function. Chronic kidney disease recovered in the early stages can prevent the progression of renal function decline. We studied a total of 85 patients with varicose ulcers with a mean age of 66.78 +/- 12.09 years, hospitalized in the Clinic of Dermatology and a control group consisting of 110 apparently healthy individuals. Urinary abnormalities have been detected in 26 (30%) of patients studied. GFR < 60 ml/min have been detected in 14 (17%) of patients studied. CRF stage II have been detected in 36 (42%) of patients studied. We detected recurrent varicose ulcer in 2 (2%) of patients studied. In two (2%) of patients during hospitalization we found a decrease in GFR by 15 and 12 ml/min, accompanied by an increase in serum creatinine from 0.7 mg % to 1 mg % in one patient and in another patient from 1.5 mg % to 2 mg %. Urinary abnormalities detected in patients with both acute and recurrent erysipelas warn about renal impairment and the need for monitoring of the renal patients with varicose ulcers.