Letter K
Kidney pain
Also known as: Renal pain
Kidney pain symptom guide: what it can mean, possible causes, and when to seek care. Educational only.
Overview
Pain in the kidney area (flank) can come from muscle strain, injury, or inflammation. Kidney pain differs from muscle aches; it is often one-sided. This is general information only, not a diagnosis. Severe, sudden, or fever-related pain needs professional assessment.
Possible causes
- Muscle strain or posture
- Injury or overuse
- Joint inflammation
- Infection (less often)
- Kidney stones
- Infection
When to see a doctor
See a clinic if kidney area (flank) pain is severe, limits activity, lasts a week, or comes with swelling/fever.