Call Your Doctor Now (night or day) If

• You feel weak or very sick
• Can't pass urine (or only a few drops) and your bladder feels very full
• Severe pain
• Fever of 100.5 F (38.1° C) or higher
• Shaking chills
• Side (flank) or back pain is present
• Abdominal pain is present
• Pain or swelling in scrotum
• Have diabetes mellitus or a weakened immune system (e.g., HIV positive, cancer chemotherapy, chronic steroid treatment, splenectomy)
• Are bedridden (e.g. nursing home patient, stroke, chronic illness, recovering from surgery)
• Are a transplant patient (e.g. liver, heart, lung, kidney)