What should you know about dull pain in lower right flank that comes and goes?

Intermittent symptoms can follow activity, posture, meals, bowel movements, or urination. Pain nearer the back or side that changes with movement can involve muscles. Kidney stones may cause waves of pain that move downward; kidney infection presents with flank pain and can include fever, chills, nausea, or urinary changes. A urinary tract infection may cause burning, urgency, or frequent urination. Lower-right abdominal pain has other possible causes, so the exact position, tenderness, appetite, bowel pattern, and progression matter.

Track each episode, including start and stop, activity, meals, bowel movements, urination, temperature, and spread. Avoid strenuous exercise until the pattern is understood, while gentle movement is fine if comfortable. Keep normal fluid intake unless restricted by a clinician. Use only label-directed pain relief and ask a pharmacist about interactions or safety with pregnancy, ulcers, kidney disease, or regular medicines. Do not take leftover antibiotics.

Arrange an appointment if episodes continue, become more frequent, or interfere with daily life. Seek urgent assessment for constant or escalating pain, fever, repeated vomiting, faintness, blood in urine, inability to urinate, a rigid or very tender abdomen, or possible pregnancy. A recent injury also changes the threshold for prompt review.

Ask whether the timing suggests a urinary, muscular, bowel, or other abdominal source; whether urine testing or imaging is needed; and what changes mean you should seek same-day care.