early symptoms of chronic renal failure

Written by Zhou Qi
Nephrology
Updated on May 08, 2025
00:00
00:00

Patients with chronic kidney failure often do not have any specific discomfort or noticeable symptoms in the early stages. However, some patients may exhibit clinical signs, such as edema, due to the kidneys' reduced ability to excrete water, or hypoproteinemia, which leads to a decrease in plasma colloid osmotic pressure, resulting in edema in the lower limbs or eyelids, and facial swelling. Patients may also experience visible blood in the urine, increased urinary foam, and chronic kidney failure often accompanies high blood pressure. Such patients may also suffer from mild renal anemia, hyperkalemia, and other clinical manifestations.

Other Voices

doctor image
home-news-image
Written by Zhou Qi
Nephrology
44sec home-news-image

Can people with chronic renal failure drink alcohol?

Patients with chronic renal failure should avoid drinking alcohol, as modern medicine has proven that alcohol is harmful to the human body and only causes damage. It can affect various systems, including the nervous system, respiratory system, circulatory system, and the metabolic system. Although the liver is the primary site for metabolizing alcohol, the byproducts of alcohol metabolism are ultimately excreted through urine, which increases the burden on the kidneys. Therefore, for patients with renal failure, drinking alcohol may lead to further progression of kidney damage. Moreover, when drinking, patients might consume a lot of high-protein and high-fat foods, which are also harmful to those with chronic renal failure.

doctor image
home-news-image
Written by Zhou Qi
Nephrology
45sec home-news-image

Chronic kidney failure is not contagious.

Chronic kidney failure is not contagious. Strictly speaking, chronic kidney failure is not an independent disease; it is a state of disease. It refers to various causes that damage the kidneys, leading to the loss of kidney tissue, and ultimately, the kidneys lose their ability to perform excretory functions. This state is called chronic kidney failure. Chronic kidney failure itself is not contagious. Contagious diseases involve some type of pathogen, whereas the common causes of chronic kidney failure include chronic nephritis, diabetes, kidney diseases, hypertensive nephropathy, etc. None of these diseases are contagious, hence chronic kidney failure is also not contagious.

doctor image
home-news-image
Written by Pan Wu Shan
Nephrology
1min 11sec home-news-image

What is good to eat for chronic renal failure?

Dietary aspects of chronic kidney failure should be divided into two parts. Firstly, for patients who have not reached the uremic phase and have not undergone dialysis, it is important to maintain a low-salt, low-fat, high-quality low-protein diet, limiting salt intake to no more than three grams per day and avoiding fried and greasy foods. Lower-quality proteins like beans, soybeans, mung beans, etc., should be consumed in smaller quantities. Instead, more animal proteins should be consumed, such as lean meats, eggs, and milk. Once patients have entered the uremic phase and have started dialysis, a low-salt, low-fat, high-quality high-protein diet is necessary, as dialysis requires a significant amount of energy. Additionally, it is crucial to restrict fluid intake; consuming too much salt or water can easily lead to generalized edema and cardiovascular complications.

doctor image
home-news-image
Written by Zhang Hui
Nephrology
1min 23sec home-news-image

What is best to eat for chronic renal failure?

Patients with chronic renal failure are advised to adopt a low-salt, low-fat, and high-quality protein diet. For those not undergoing dialysis, protein intake should be strictly controlled to 0.6 to 0.8 grams per kilogram of body weight per day. Additionally, patients with stage 3 CKD or above often experience electrolyte disorders, such as hyperkalemia, which can lead to cardiac arrest and arrhythmias. Therefore, it is important to avoid foods high in potassium, such as bananas, oranges, dates, kiwis, and tomatoes. Due to the strict protein intake, hypoproteinemia may occur, and these patients are also prone to hyperphosphatemia. It is recommended to choose foods with a low phosphorus to protein ratio, generally those with a ratio below fifteen. After starting dialysis, the same principles apply, but protein intake can be slightly increased, as some protein is lost during both hemodialysis and peritoneal dialysis. The protein intake can be adjusted to 1.0 to 1.2 grams per kilogram of body weight per day, while still controlling phosphorus and potassium intake.

doctor image
home-news-image
Written by Zhou Qi
Nephrology
55sec home-news-image

How to test for chronic renal failure?

The examinations for patients with chronic kidney failure are divided into several aspects: First, it is necessary to confirm the presence of chronic kidney failure and assess its severity. This requires blood tests for kidney function, observing levels of blood creatinine and urea nitrogen, and performing endogenous creatinine clearance tests to determine the degree of kidney failure; Second, it is important to determine whether there are complications associated with kidney failure. Therefore, routine blood tests are necessary to check for renal anemia, blood pressure measurements to observe if there is renal hypertension, and blood tests for electrolytes to check for any electrolyte disorders. These patients also need to have their parathyroid hormone levels checked and undergo iron metabolism tests to provide a basis for further treatment.