When Should I Seek Emergency Care for IgA Nephropathy?

While IgA nephropathy usually progresses slowly over years, certain symptoms or changes in your lab results require immediate medical attention. It is critical to know when to call emergency services and when to contact your kidney team for a same-day evaluation.

Go to the nearest Emergency Room or call 911 if you experience any of the following:

• Chest pain or acute, severe shortness of breath
• Confusion, fainting, severe weakness, or new neurologic symptoms
• A complete inability to urinate
• Signs of shock or severe infection, such as cold, clammy skin or rapidly worsening breathing ^[1][2]

Contact your nephrologist or clinic for a same-day assessment if you experience:

• A marked or sudden reduction in your urine output
• Severely high blood pressure without the emergency symptoms listed above
• Persistent vomiting, severe diarrhea, or an inability to keep fluids down
• New or persistent dark, red, or cola-colored urine, especially if accompanied by flank pain or a drop in urine output

Rapid Decline in Kidney Function

A sudden drop in your kidney function requires urgent assessment. This is generally seen in two forms:

Acute Kidney Injury (AKI)
AKI is a sudden decrease in kidney function that happens within a few hours or days ^[3]. It is typically diagnosed by doctors if your blood creatinine (a waste product) rises by at least 0.3 mg/dL within 48 hours, or if it increases to 1.5 times your normal baseline within 7 days ^[3]. Another critical warning sign is a sharp reduction in urine output. While doctors look for specific durations of low urine output to classify severe AKI, any marked or sudden reduction in urine warrants urgent assessment, and a complete inability to urinate is a medical emergency ^[4][5]. Do not wait hours to see if your urine returns if you cannot urinate at all.

AKI in IgA nephropathy can be triggered by a severe flare of the disease, severe dehydration, or certain medications, including over-the-counter NSAIDs (like ibuprofen) ^[6][7][8]. You should ask your doctor before taking NSAIDs. However, never stop taking your prescribed kidney-protective medicines (such as ACE inhibitors or ARBs) without your clinician’s instructions; instead, ask your care team for a “sick-day” plan ^[7].

Rapidly Progressive Glomerulonephritis (RPGN)
RPGN is a clinical syndrome where severe kidney inflammation causes a rapid loss of kidney function over days, weeks, or a few months ^[9]. For patients with IgA nephropathy, clinical guidelines define this as a 50% or greater drop in your estimated glomerular filtration rate (eGFR) within 3 months, after reversible causes of kidney injury have been ruled out ^[10]. When kidney function drops rapidly, a nephrologist will recommend urgent tests—and sometimes a kidney biopsy—to determine if the cause is reversible (like a medication effect) or if it is true progressive IgA nephropathy requiring emergency treatment ^[9][11].

Severe High Blood Pressure

While high blood pressure is common in IgA nephropathy, a hypertensive emergency occurs when blood pressure is severely elevated and is actively damaging your organs ^[12].

If you get a very high blood pressure reading (often considered 180/120 or higher), sit quietly, ensure your cuff fits correctly, and repeat the reading after a brief rest ^[13]. You should seek immediate emergency care if your severely high blood pressure is accompanied by any of these symptoms of acute organ damage:

• Chest pain
• Acute shortness of breath
• Confusion, severe headache, or weakness
• Changes in your vision

The actual blood pressure number is less important than the symptoms; organ damage can occur even before these thresholds are reached ^[12][1]. If you have severe high blood pressure without these symptoms, you still need prompt medical guidance. Contact your doctor the same day, but do not take extra doses of your medication unless explicitly instructed to do so ^[13][14].

Fluid Overload

When your kidneys are failing acutely, they cannot remove extra fluid from your body. This can lead to fluid overload, characterized by sudden, severe swelling (edema) in your legs or a rapid increase in weight ^[15].

If fluid builds up in your lungs, it causes pulmonary edema, leading to sudden and severe breathlessness or difficulty breathing when lying down ^[16]. This is a life-threatening emergency that requires immediate medical services. Emergency treatment in the hospital may include oxygen, positioning, strong diuretics, and sometimes urgent dialysis to remove the excess fluid ^[16][17].

Persistent Dehydration and Infection

Severe dehydration can quickly cause an acute kidney injury by reducing the blood flow to your kidneys ^[18]. If you experience persistent vomiting, severe diarrhea, or an inability to keep fluids down, contact your clinician the same day, especially if your urine output drops ^[18][19]. Do not force yourself to drink large amounts of fluid if you are already breathless or swollen, as this can worsen fluid overload. Your care team will assess you to determine if oral rehydration, medication adjustments, or intravenous (IV) fluids are safe and necessary.

Similarly, serious infections can act as a trigger for both acute kidney injury and severe flares of IgA nephropathy ^[20][21]. If you develop signs of sepsis—such as confusion, rapidly worsening breathing, severe weakness, or cold/clammy skin—seek emergency care immediately.