Many conditions, medicines, and diseases interfere with the ability to heal or fight infection. Your child may be at risk for a more serious problem from his or her symptoms if he or she has any of the following. Be sure to tell your child's health professional.

Conditions

• History of nephrotic syndrome
• History of previous urinary tract infection
• Prematurity or abnormally slow growth and development
• Previous surgery on the urinary tract
• Recent catheterization or has a catheter in place
• Structural deformities of the urinary tract
• Uncircumcised

Medicines

• Corticosteroids, such as prednisone
• Medicine that causes difficulty urinating, such as Actifed, Benadryl, Chlor-Trimeton, Dimetapp, Robitussin Cough and Cold, or Tavist
• Medicines used to treat cancer (chemotherapy)
• Radiation therapy

Diseases

• An impaired immune system
• Cancer
• Diabetes
• Human immunodeficiency virus (HIV) infection
• Sickle cell disease