Kidney stones and sepsis: warning signs to know

A stone may narrow or block the passage that drains urine from the kidney. If bacteria are present behind that blockage, the infection may not clear normally and can spread into the bloodstream. This is different from uncomplicated stone pain, which may be severe but does not by itself mean sepsis.

Possible warning symptoms include fever, shaking chills, feeling unusually weak, fast breathing, dizziness, confusion, vomiting, flank pain and painful urination. Not everyone has every symptom, and a normal temperature does not safely rule out a serious problem.

If you have a stone with fever, chills or a marked change in how you feel, seek emergency medical assessment immediately. Tell the team that you may have a kidney stone and describe changes in urine flow. Do not wait for the stone to pass at home and do not use leftover antibiotics.

Clinicians may test urine and blood, check kidney function and use imaging such as an abdominal ultrasound to look for obstruction. Treatment can require antibiotics and urgent drainage of blocked urine; the exact approach depends on the findings.

Call emergency services for confusion, fainting, severe weakness, breathing difficulty or difficulty staying awake. Go to emergency care promptly for fever or chills with flank pain, repeated vomiting, rapidly worsening pain, or difficulty passing urine. Arrange same-day medical advice for new painful urination with a suspected stone, even if the symptoms seem manageable.

Ask what showed infection or blockage, whether the stone needs to be removed or bypassed, how long to take prescribed treatment, which symptoms mean the infection may be returning, and how future stones can be prevented.