What are the treatment options for kidney infection?

A kidney infection can cause fever, chills, pain in the side or back, nausea, and urinary symptoms. It can become serious, so clinicians usually assess you promptly rather than relying on home care. A urine test can look for infection and help guide the antibiotic choice; other tests may be needed when the illness is complicated.

Antibiotic treatment may be given by mouth when you are well enough to take it and absorb it. People who are very unwell, vomiting, pregnant, dehydrated, or at higher risk of complications may need antibiotics through a vein and observation in hospital. Pain relief and fluids support recovery but do not replace antibiotics.

Take the prescribed antibiotic for the full course unless the treating clinician changes it. Rest, drink fluids if you can, and use only pain medicines that are suitable for you. Keep the medicine list available and mention allergies, pregnancy, kidney problems, and previous resistant infections.

Symptoms should be monitored closely after treatment starts. If your clinician asks for a repeat urine sample or review, attend even if you feel better, because persistent infection may require a different antibiotic or further assessment.

Seek urgent medical care for fever with side or back pain, repeated vomiting, confusion, faintness, severe weakness, or inability to keep fluids down. If treatment has started but you are worsening or not beginning to improve, contact the treating service promptly. Pregnancy, a single functioning kidney, or urinary blockage lowers the threshold for urgent review.

Ask whether a urine test was sent, when results may change the antibiotic, how to manage pain, and what improvement to expect. Clarify which symptoms require emergency care and whether an underlying stone, blockage, or recurrent urinary infection needs investigation.