Acute and chronic nephritis: what is the difference and why it is important not to miss the onset of the disease

Diagnosis of nephritis in Mykolaiv: why ZDRAVO is chosen

Nephritis is an inflammatory lesion of kidney tissue that disrupts the natural process of blood filtration and removal of excess fluid from the body. During inflammation, the structure of nephrons changes, blood supply to the kidneys worsens, and their ability to cleanse the blood of toxins gradually decreases.
The greatest danger of nephritis lies in the fact that initial kidney dysfunction can remain unnoticed for a long time. Even minor changes in urine composition or periodic swelling indicate that kidney tissue is already being damaged.
Without timely diagnosis, the inflammatory process leads to a gradual reduction of the functional reserve of the kidneys, creating prerequisites for persistent disorders of their function and serious complications in the future.

Why nephritis can have different courses

Inflammation of kidney tissue does not always develop in the same way. The nature of the disease is determined by the cause of the damage, the activity of the immune system, and the speed of treatment initiation. It is the combination of these factors that forms different variants of the course of nephritis.

There are two main types of course:

• Acute course
  Characterized by rapid development of inflammation, pronounced symptoms, and relatively short duration. With timely medical care, the structure and function of the kidneys can be fully restored.
• Chronic course
  Develops gradually or as a consequence of insufficiently treated inflammation. The process lasts for years, is accompanied by slow destruction of kidney tissue, and increases the risk of developing chronic kidney failure.

It is precisely the stage at which inflammation is detected and how correctly the treatment is selected that determines whether the kidneys can fully restore their function or whether the process will become irreversible.

How acute nephritis manifests

An acute inflammatory process in the kidneys most often develops 1–3 weeks after an upper respiratory tract infection or skin disease. A person already considers themselves healthy, but characteristic kidney dysfunction suddenly appears.

Typical manifestations of acute nephritis:

• Sudden swelling — mainly in the face, eyelids, and lower legs.
• A sharp increase in blood pressure, which may be accompanied by headache.
• Changes in urine — the appearance of blood or protein impurities, darkening of its color.
• Decreased daily urine output.
• General symptoms — weakness, body aches, pain or pressure in the lower back.

The acute phase usually lasts from several weeks to two months. With early medical consultation, kidney function in most cases is fully restored.

If you notice swelling in the morning, do not wait for it to go away on its own. Schedule express urine diagnostics and ultrasound at ZDRAVO today.

How chronic nephritis develops

A prolonged inflammatory process forms gradually or after incomplete treatment of previous kidney damage. The peculiarity of this condition is that symptoms increase slowly and remain barely noticeable for a long time.

The most common complaints in the chronic course:

• Persistent fatigue, decreased endurance.
• Periodic or moderate swelling that may resolve on its own.
• Persistent elevation of blood pressure.
• Changes in laboratory urine parameters without pronounced clinical manifestations.

Exacerbations often occur after hypothermia, infections, or severe stress. Gradually, scar changes form in kidney tissue, the number of functional nephrons decreases, and there is a slow loss of the kidneys’ filtration capacity.

Causes of nephritis: what triggers kidney inflammation

The kidneys can be affected by an inflammatory process under the influence of various internal and external factors. In most cases, the disease occurs not due to a single cause, but as a result of a combination of several influences.

Main risk factors:

• Bacterial and viral infections.
  After sore throat, flu, or other infections, the immune system may trigger an inflammatory response that affects kidney tissue even after the main symptoms have disappeared.
• Disorders of the immune system.
  In autoimmune conditions, the body begins to damage its own kidneys, leading to hidden but progressive damage to nephrons.
• Prolonged hypothermia.
  Regular exposure to cold on the lower back and lower limbs reduces local protection and promotes the development of inflammation.
• Toxic influences.
  Alcohol, certain medications, and industrial chemicals can damage kidney tissue.
• Allergic reactions to medications or foods.
  In some people, an immune response to common substances causes swelling and inflammation of the kidney interstitium.
• Improper treatment of urinary tract infections.
  Self-medication or premature discontinuation of antibiotics often leads to the spread of infection to the kidneys.

Main differences between acute and chronic nephritis

Nephritis can have different courses, which determines not only the severity of symptoms but also the further prognosis for kidney health. To better understand how the main variants of the disease differ, it is worth comparing them by key clinical features.

These differences show that the same inflammatory disease can have very different outcomes. That is why early diagnosis and monitoring of the course of nephritis are crucial for preserving kidney function.

When to see a doctor

Inflammatory kidney diseases are dangerous because even seemingly minor symptoms may indicate serious dysfunction. A visit to the doctor should not be postponed if signs appear that were not observed before or tend to recur.

Examination is recommended in case of:

• appearance of swelling of the face, eyelids, or legs;
• persistent or sudden increase in blood pressure;
• changes in the color, clarity, or daily volume of urine;
• pain, heaviness, or discomfort in the lower back;
• detection of abnormalities in a general urine test during a preventive examination.

In such situations, it is important to consult not only a therapist or nephrologist, but also a urologist, who assesses the condition of the urinary tract, helps rule out concomitant urological pathologies, and determines further examination tactics. Even isolated episodes of such symptoms are sufficient grounds for a full consultation. At ZDRAVO, a urologist will help rule out urinary tract infections, which often cause nephritis in women and children.

How the diagnosis is confirmed

For accurate assessment of kidney condition, step-by-step diagnostics are used, allowing not only to confirm the inflammatory process but also to determine the degree of tissue damage.

Usually used:

• Laboratory blood and urine tests — detect inflammatory changes, impaired filtration function, and the presence of impurities in urine.
• Ultrasound examination of the kidneys — helps assess the size, structure, and blood supply of the organs.
  Additional instrumental methods — prescribed if necessary to clarify the diagnosis.

Doctors of various specialties may be involved in the examination to comprehensively assess the patient’s condition and determine further treatment tactics.

How nephritis is treated

Therapy is aimed not only at relieving inflammation, but also at preserving the maximum number of functioning nephrons.

Basic principles of treatment:

• temporary limitation of physical activity during exacerbation;
• dietary correction with reduced salt and controlled fluid intake;
• use of antibacterial drugs in confirmed infectious etiology;
• prescription of immunocorrective agents if necessary;
• use of diuretics and medications to stabilize blood pressure.

The therapy regimen is selected individually and requires regular monitoring of tests. At the ZDRAVO clinic, we select therapy based on international protocols, avoiding excessive medication load on your kidneys.

When inpatient treatment is needed

Hospital stay is necessary if the condition rapidly worsens or threatening symptoms occur.

Hospitalization is recommended for:

• significant swelling that rapidly increases;
• sharp increase in blood pressure;
• severe lower back pain;
• signs of decreased kidney function according to tests.

Nutrition and lifestyle in nephritis

Changes in daily habits significantly affect the course of the disease and the speed of recovery.

Recommended:

• limit salt and heavy protein foods;
• consume sufficient vegetables and easily digestible products;
• avoid hypothermia;
• regularly monitor blood pressure;
• do not take medications without consulting a doctor.

Prevention of nephritis

Preventing kidney inflammation is easier than treating its consequences.

To preserve kidney health, it is important to:

• complete treatment of infections;
• maintain an optimal drinking regimen;
• regularly undergo preventive examinations;
• strengthen immunity through a healthy lifestyle;
• avoid self-medication and uncontrolled drug use.

These simple steps help reduce the risk of developing nephritis and preserve kidney function for years to come.