Renal cyst is a benign lesion with abnormal kidney structure, which can appear unilaterally or bilaterally in the kidney. Generally speaking, smaller cysts do not cause great harm to human body. When the diameter of cysts reaches more than 4cm, it may cause pain and swelling in kidney area, bleeding, renal hypertension and other harms.
1. Renal distension and pain: due to larger cysts, pulling the renal periosteum outward or pressing the renal parenchyma inward, renal area or back pain often occurs, mainly distension and pain.
2. Renal hypertension, obstruction: cysts may compress the ureter or the neck of the renal calyx, causing ureteral or renal calyx obstruction. If the obstruction lasts for a long time, it can cause secondary infection, lumbago, fever, pus urine, leukocytosis, etc.. If the cyst compresses the neighboring blood vessels, it can manifest as renal hypertension.
3. Bleeding: If the cyst bleeds a lot and causes the wall of the cyst to expand greatly, severe pain in the waist may appear. When secondary infection occurs, in addition to the aggravation of pain, there are symptoms such as elevated body temperature and general malaise. Some patients may have hematuria.
When the above symptoms occur, it is recommended that patients go to the hospital as soon as possible, and be actively treated under the guidance of the doctor.