nephritis in older adults

Overview

Nephritis means inflammation of the kidneys. The kidneys are two bean-shaped organs that filter waste and extra water from your blood to make urine. When they become inflamed, they may not work as well as they should. Nephritis can be sudden (acute) or long-term (chronic). With early care, many people get better, but sometimes it can lead to lasting kidney damage.

Nephritis is not the most common kidney problem in older adults, but it does happen. It may be underdiagnosed because the symptoms are often subtle and can be mistaken for other conditions.

Nephritis can affect people of all ages, but older adults are more vulnerable because they often have other health conditions, take multiple medicines, and may have weaker immune systems.

Symptoms

Common symptoms

• Swelling in the legs, ankles, or feet
• Foamy or bubbly urine
• Blood in the urine (pink, red, or cola-colored)
• Less urine than usual
• Feeling very tired
• Nausea or poor appetite
• High blood pressure

Symptoms in children

• Nephritis in children is rare, but it can happen after an infection. Symptoms may include puffy face, dark urine, and high fever.

Symptoms in older adults

• Confusion or trouble thinking clearly
• Less urine output, which may be easy to miss
• Feeling unusually weak or unsteady
• Falling or needing help with daily activities
• Fluid buildup that causes weight gain or trouble breathing

Causes

Main causes

• Infections, such as a severe urinary tract infection or an infection elsewhere in the body
• Autoimmune conditions, where the body's defense system attacks the kidneys by mistake
• Certain medicines, including some pain relievers and antibiotics, that can irritate the kidneys
• High blood pressure that damages the kidney's filtering units
• Diabetes, which can also harm the kidneys over time

Risk factors

• Being over 65
• A history of kidney disease or family history of kidney problems
• Long-term conditions like diabetes, high blood pressure, or heart disease
• Using over-the-counter pain relievers regularly
• Recent infections or hospital stays
• Dehydration from not drinking enough fluids

When to see a doctor

See a doctor urgently if:

• If you notice blood in your urine, have sudden swelling, or are urinating much less than usual, contact your doctor or local same-day care service as soon as possible.
• If you have a high fever with back pain, seek medical advice within 24 hours.

Book a routine appointment if:

• Make an appointment if you have leg swelling, frothy urine, extreme fatigue, or high blood pressure readings at home.
• If you are over 65 and have diabetes or high blood pressure, ask your doctor about regular kidney function checks.

Diagnosis

Doctors diagnose nephritis by asking about your symptoms, checking your blood pressure, and ordering urine and blood tests. They may also use imaging or a kidney biopsy to look more closely at the kidney tissue.

Tests that may be done

• Urine test (to look for blood, protein, or infection)
• Blood test (to check kidney function and signs of inflammation)
• Ultrasound of the kidneys (to see their size and structure)
• Kidney biopsy (a tiny sample of kidney tissue, taken with a needle) in some cases

What to expect at your appointment

The tests are usually not painful, though a biopsy may cause some local soreness. Your doctor will walk you through each step. You may be asked to collect urine over 24 hours or to fast for a blood test. Results take a few days to a couple of weeks.

Treatment

Treatment for nephritis depends on the cause. The goal is to reduce kidney inflammation, treat any infection, control blood pressure, and protect kidney function. Your care team will tailor the plan to your overall health and needs.

Self-care at home

• Drink enough fluids — but ask your doctor how much is right for you, because too much can also be a problem.
• Take your medicines exactly as prescribed and discuss any over-the-counter products with your doctor or pharmacist.
• Monitor your urine color and amount, and report any big changes.
• Weigh yourself at the same time daily to notice sudden fluid buildup.
• Get rest and avoid heavy lifting or strenuous activity while your kidneys are inflamed.

Medical treatments

Doctors may prescribe medicines to control blood pressure, reduce inflammation, or calm an overactive immune system. If an infection is the cause, you may receive antibiotics. In severe cases, you might need a short hospital stay and, in some situations, dialysis — a machine that filters your blood — while your kidneys recover. Your doctor will not recommend any medication unless it is right for you.

When is surgery considered?

Surgery is rarely needed for nephritis itself. In some cases, a doctor may insert a small tube to drain a blocked kidney, or you may be referred to a kidney specialist for further care.

Living with this condition

Living with nephritis means keeping an eye on your kidneys and staying in touch with your care team. You may need regular blood and urine tests to monitor your kidney function. Simple routines, like tracking your weight and blood pressure, make a big difference. Ask your pharmacist about your medicines and always check before taking anything new.

Lifestyle tips

• Stay as active as you safely can — a short walk every day is often a good start.
• Get enough sleep and keep regular routines to help your body heal.
• Avoid smoking and limit alcohol.
• Manage stress with relaxation exercises, hobbies, or talking with friends.
• Keep all follow-up appointments, even if you feel better.

Diet and exercise

Your doctor may suggest a kidney-friendly diet. This often means limiting salt, eating balanced meals, and sometimes watching potassium and protein. A dietitian can help you plan meals that taste good and support your kidneys. Gentle exercise, like walking or stretching, can improve your energy and mood, but check with your doctor first.

Mental health and emotional wellbeing

Living with a kidney condition can feel worrying or overwhelming. It is normal to feel sad, anxious, or frustrated. Talk to your family and your doctor about how you are feeling. If you feel very down or have thoughts of harming yourself, reach out for crisis support right away — call your local emergency number or a mental health crisis line.

Prevention

Not all cases of nephritis can be prevented, but you can lower your risk by staying well-hydrated, avoiding unnecessary medicines (especially over-the-counter pain pills), controlling high blood pressure and diabetes, and treating infections promptly.

Vaccines

Keep your vaccinations up to date, including the flu, pneumonia, and COVID-19 vaccines, if recommended for you. Preventing infections can help protect your kidneys. Ask your doctor or pharmacist which vaccines are right for your age and health.

Screening programmes

If you have diabetes, high blood pressure, or a family history of kidney disease, ask your doctor about regular kidney function tests. A simple urine and blood test can catch problems early.

Complications

If left untreated

• Persistent kidney damage that leads to chronic kidney disease
• Kidney failure, which may need dialysis
• High blood pressure that becomes hard to control
• Fluid buildup and swelling that can strain the heart
• Increased risk of infections and other organ problems

Long-term outlook

The outlook for nephritis is usually positive if it is caught and treated early. Many people recover fully or manage well with long-term care. Even if your kidneys are not perfect, treatment can slow damage and help you maintain a good quality of life. Your health care team will support you every step of the way.

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