Chronic kidney disease (CKD) affects millions of people worldwide, and many individuals do not realize they have it until the disease has already progressed. One of the most commonly diagnosed stages is stage 3 CKD, where kidney function becomes moderately reduced and symptoms may begin appearing for the first time.
Many people ask, “How do you get stage 3 kidney disease?” The answer is not always simple. Stage 3 CKD usually develops gradually over many years due to ongoing damage caused by conditions like diabetes, high blood pressure, autoimmune diseases, infections, or unhealthy lifestyle habits.
Understanding the causes, warning signs, and treatment options for stage 3 kidney disease may help people protect their kidney health before the condition progresses to advanced kidney failure.
What Is Stage 3 Kidney Disease?
Stage 3 chronic kidney disease means the kidneys are no longer working at full capacity. Doctors diagnose stage 3 CKD when the estimated glomerular filtration rate (eGFR) falls between 30 and 59 for at least three months. (Mayo Clinic)
Stage 3 is divided into two substages:
- Stage 3a: eGFR between 45 and 59
- Stage 3b: eGFR between 30 and 44
At this stage, the kidneys have mild to moderate damage and begin struggling to remove waste, excess fluids, and toxins effectively. (National Kidney Foundation)
The good news is that many people with stage 3 CKD can still live normal lives if the condition is properly managed.
How Do You Get Stage 3 Kidney Disease?
Stage 3 CKD develops when the kidneys experience long-term damage over time. Unlike sudden kidney injury, chronic kidney disease usually progresses slowly and silently.
Below are the most common ways people develop stage 3 kidney disease.
1. Diabetes
Diabetes is the leading cause of chronic kidney disease worldwide.
High blood sugar levels damage the tiny blood vessels inside the kidneys, reducing their ability to filter waste properly. Over time, this ongoing damage may progress into stage 3 CKD or even kidney failure. (Mayo Clinic)
People with uncontrolled diabetes are especially at risk.
Common warning signs include:
- Protein in urine
- Swelling
- Fatigue
- Increased urination
- High blood pressure
Keeping blood sugar levels under control is one of the most important ways to prevent kidney damage.
2. High Blood Pressure
High blood pressure, also called hypertension, is another major cause of stage 3 kidney disease.
When blood pressure remains elevated for years, it damages the blood vessels inside the kidneys, making it harder for them to filter blood effectively. (Mayo Clinic)
Unfortunately, kidney disease can also worsen blood pressure, creating a dangerous cycle.
Many people with stage 3 CKD first discover their condition during routine blood pressure testing.
A Reddit user with CKD reported blood pressure levels as high as “220/180” before their diagnosis.
3. Autoimmune Diseases
Certain autoimmune disorders can attack the kidneys directly.
Conditions linked to CKD include:
- Lupus
- IgA nephropathy
- Vasculitis
- Rheumatoid arthritis
These diseases cause inflammation inside the kidneys that may gradually destroy healthy tissue over time.
Some younger adults diagnosed with stage 3 CKD later discover they have underlying autoimmune kidney diseases such as IgA nephropathy.
4. Genetic and Inherited Kidney Disorders
Some people develop stage 3 CKD due to inherited conditions.
One common example is polycystic kidney disease (PKD), which causes fluid-filled cysts to grow inside the kidneys and gradually reduce kidney function.
Other inherited kidney disorders may also increase the risk of CKD progression.
Family history plays an important role in kidney disease risk. If close relatives have kidney problems, your chances of developing CKD may be higher.
5. Long-Term Use of Certain Medications
Certain medications can damage the kidneys when used excessively or over long periods.
Common examples include:
- NSAID pain relievers
- Ibuprofen
- Naproxen
- Some antibiotics
- Certain acid reflux medications
The National Kidney Foundation warns that regular NSAID use may worsen kidney damage, especially in people who already have reduced kidney function.
6. Recurrent Kidney Infections or Kidney Stones
Repeated kidney infections and untreated kidney stones may scar the kidneys over time.
This chronic damage can gradually reduce kidney function and eventually lead to stage 3 CKD.
People with recurrent urinary tract infections (UTIs) or blockages in the urinary system may face higher risks of kidney damage if left untreated.
7. Obesity and Poor Lifestyle Habits
Lifestyle choices significantly affect kidney health.
Risk factors include:
- Obesity
- Smoking
- Lack of exercise
- Poor diet
- Excessive alcohol intake
- High sodium consumption
Smoking, in particular, may accelerate kidney disease progression and increase the risk of cardiovascular complications. (National Kidney Foundation)
Common Symptoms of Stage 3 Kidney Disease
Many people with stage 3 CKD experience few symptoms at first. However, symptoms often become more noticeable as kidney function declines.
Common symptoms include:
- Fatigue
- Weakness
- Swelling in the feet and ankles
- Frequent urination
- Foamy urine
- Dry or itchy skin
- Muscle cramps
- Nausea
- Trouble sleeping
- Brain fog
The National Kidney Foundation states that symptoms may first appear during stage 3 CKD, although some people still have no symptoms at all.
According to Reddit discussions, many patients report symptoms such as:
- Brain fog
- Tingling sensations
- Swollen ankles
- Fatigue
- Difficulty breathing
- Itchiness
- Puffiness around the eyes
Interestingly, some people are diagnosed unexpectedly during routine lab work despite feeling completely normal.
How Is Stage 3 Kidney Disease Diagnosed?
Doctors use several tests to diagnose CKD.
Common tests include:
- eGFR blood test
- Creatinine blood test
- Urine protein test
- Blood pressure monitoring
- Kidney ultrasound
- Electrolyte testing
Persistent abnormal kidney function for three months or longer is typically required for a CKD diagnosis.
Can Stage 3 Kidney Disease Be Reversed?
Unfortunately, chronic kidney damage is usually permanent once it reaches stage 3.
However, progression can often be slowed significantly with proper treatment and lifestyle changes. (Health)
Many people with stage 3 CKD never progress to kidney failure if they manage the condition carefully.
Treatment Options for Stage 3 CKD
Treatment usually focuses on protecting remaining kidney function and preventing complications.
Medications
Doctors may prescribe:
- Blood pressure medications
- Diabetes medications
- Cholesterol medications
- Iron supplements
- Diuretics
Kidney-Friendly Diet
A kidney-friendly diet may include:
- Lower sodium intake
- Reduced processed foods
- Balanced protein intake
- Controlled potassium and phosphorus
Lifestyle Changes
Healthy habits may help slow CKD progression:
- Stop smoking
- Exercise regularly
- Maintain healthy blood pressure
- Control blood sugar
- Stay hydrated appropriately
The National Kidney Foundation encourages healthy lifestyle choices during stage 3 CKD because early intervention can help delay kidney failure.
Natural Kidney Wellness Support
Many people with kidney concerns also explore educational wellness programs focused on kidney-friendly nutrition, hydration, and healthy lifestyle habits.
You can learn more here:
These wellness resources are designed to complement professional medical care and encourage healthier daily routines that support overall kidney wellness.
When Should You See a Doctor?
You should speak with a healthcare professional if you experience:
- Persistent fatigue
- Swelling
- Foamy urine
- Blood in urine
- High blood pressure
- Shortness of breath
- Unexplained nausea
Early diagnosis is extremely important because CKD often progresses silently for years.
Final Thoughts
If you are wondering, “How do you get stage 3 kidney disease?” the answer usually involves years of ongoing kidney damage caused by diabetes, high blood pressure, autoimmune diseases, medications, infections, or unhealthy lifestyle habits.
Stage 3 CKD is serious, but it does not automatically mean kidney failure is inevitable. Many people successfully manage the condition for years through proper medical care, healthy lifestyle changes, and regular monitoring.
Recognizing symptoms early and addressing risk factors quickly may help protect kidney function and improve long-term health outcomes.