People who have crossed their 50s are susceptible to renal cysts. Renal cysts are small oval or round-shaped thin sacs or pockets that contain a watery fluid. They are non-cancerous and often, people having renal cysts do not even realize that they have them. The most common symptoms of renal cysts are increase in blood pressure, pain in the back and sides, urine infection, etc. Unless an ultrasound is performed, it is difficult to detect renal cysts. An individual is said to have bilateral renal cysts, which is also known as Polycystic Kidney Disease or PKD, when he has simple renal cysts in both his kidneys. Renal cyst is a type of kidney infection. A round space is formed in the kidney which is filled with the watery liquid. This sphere has no irregularities in it. As a person crosses the age of 50, there are 50-50 chances that he/she will develop a simple/bilateral cyst in the kidney. This cyst may grow with the increase in the age of the person. Hyperdense cyst is a type of simple renal cyst. There's blood within its walls. Simple renal cysts are the most common types of renal cysts. These do not complicate further into kidney cancer and have no medical implications. If there is only one simple cyst in each kidney, then it is not a major issue. But if there are more than one cysts, then it is a cause for concern. When there are a number of cysts in both the kidneys, the person is said to have multiple bilateral renal cysts. Experts believe that when these cysts grow inside the kidneys, after a few years they take up all the space in the kidneys. This leads to reduction in the kidney's ability to eliminate the wastes in the body. This is a nocent situation that can turn life-threatening. This accumulated waste becomes very toxic for the body. It acts as a poison and the person may need dialysis or kidney transplantation. Symptoms Headache, fatigue, frequent urination, blood in urine, abdominal pain, pain in the flank or kidney pain are some of the symptoms of bilateral renal cysts. Kidney stones may also cause renal cysts. PKD passes from one generation to the other. More than 90% of the people get this disease from their parents. Other than that, there may be several issues related to the kidneys that may give a person renal cysts in which case it is known as Acquired Cystic Kidney Disease. Diagnosis After taking into account the family medical history, allergies, medications, and the above symptoms, the doctor will be able to diagnose if a person has bilateral kidney cysts. Further medical examinations will be required to determine the seriousness and the complexities of the case. Examinations also reveal how much the kidneys have been damaged, how many cysts have been formed in the kidneys, how many other organs have been affected, what kind of treatments will be best suitable, and any other complications that may have arisen due to the cysts. Ultrasound tests, blood sample tests, and urine sample tests are usually conducted. Apart from these, other tests may be conducted based on the doctor's decision. Treatment After proper diagnoses, comes the treatment. A kidney specialist is the right person to go to for proper treatment. He/she will decide the right course of treatment based on the above-mentioned tests. In some cases, dialysis may be required and in extreme cases, kidney transplantation may become necessary. The specialist may also prescribe medications. These medications need to be taken only according to the prescription. Drinking plenty of water and following a strict diet may be advised. As mentioned earlier, bilateral renal cysts may cause a kidney failure. If a person shows any of the above-mentioned symptoms, he/she needs to consult a doctor immediately. If not treated on time, these cysts can lead to severe complications.