Fever
Abdominal pain or Flank pain
crepitus over the flank may be present in severe cases
Nausea/vomiting
Dyspnea
Renal dysfunction
Altered mental status
Shock
Thrombocytopenia
crepitus over the flank may be present in severe cases
Emphysematous pyelonephritis
Genitourinary infection
Pyelonephritis
Acute cystitis 
Renal abscess
Acute cystitis
Urethritis
Glomerulonephritis