Can a kidney cyst cause pain?

[Argirios Argiriou]

Yes, a kidney cyst can cause pain, usually if it becomes large enough to press on organs, gets infected, bursts, or blocks urine flow, leading to dull pain in the back, side, or abdomen, which can sometimes be severe. Simple cysts often don't cause problems, but complications like infection (fever, pain, tenderness) or rupture (severe pain, blood in urine) definitely can, according to the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) and the Mayo Clinic.
 
When Kidney Cysts Cause Pain:

Enlargement: A large cyst can press on nearby structures, causing a dull ache in your back, side, or upper abdomen.

Infection: An infected cyst can cause pain, fever, chills, and tenderness.

Rupture (Bursting): A burst cyst can cause sudden, severe pain in the back or side, sometimes with blood in the urine (hematuria).

Blocked Urine Flow: A cyst blocking the ureter (tube from kidney to bladder) can cause swelling and pain, notes the Mayo Clinic.
 
Other Symptoms to Watch For

Blood in your urine (hematuria)

Fever and chills (if infected)

Frequent urination or changes in urinary habits

High blood pressure

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