When to Worry About Blood in Urine With Sickle Cell Disease

Sickle cell disease can affect the small blood vessels and the kidney's ability to concentrate urine, which may lead to haematuria. Dehydration, infection, stones, medicines, and other kidney problems can also cause bleeding. Urine may look pink, red, or brown, or blood may appear only on testing. A known sickle cell diagnosis does not explain every episode automatically.

Contact your haematology or primary-care team when blood appears, especially if it is new, recurrent, or accompanied by pain. Follow your individual hydration plan and continue prescribed medicines unless a clinician tells you otherwise. Note urine colour, clots, urine volume, fever, flank pain, and recent illness. Share the information with the team even if the bleeding stops.

Use emergency services for heavy or ongoing bleeding, clots, inability to urinate, severe side or abdominal pain, fever, faintness, confusion, breathlessness, or symptoms of a severe pain crisis. Reduced urine output also needs rapid assessment because it may signal kidney stress, obstruction, or dehydration.

Ask whether urine and kidney-function tests are needed, whether medicines should be reviewed, and how much fluid is appropriate for you. Clarify your team's plan for after-hours bleeding and which pain or fever symptoms require immediate attendance.