Starting dialysis can bring a lot of questions. One of the most common is simple: “How will I feel during and after treatment?”
Some people feel tired after dialysis. Others may experience dizziness, muscle cramps, nausea, itching, or a drop in blood pressure during treatment. Not everyone has the same experience, and a symptom isn’t always caused by dialysis itself. Kidney failure, medicines, fluid changes, diet, and other health conditions can also contribute.
Knowing the common dialysis side effects can help you recognise what’s expected, what should be discussed with your dialysis team, and which symptoms need prompt medical attention.
What Is Dialysis and Why Can It Cause Side Effects?
Healthy kidneys continuously remove waste and extra fluid from the blood. When kidney function becomes severely reduced, dialysis can take over part of this work.
During hemodialysis, blood passes through a dialyzer that removes waste and excess fluid before returning the blood to the body. The treatment can be life-saving, but it doesn’t perform every function of healthy kidneys.
Because dialysis can change the amount of fluid and certain substances in your blood over a few hours, some people develop symptoms during or shortly after treatment.
The important point is that dialysis treatment side effects vary from person to person. Your treatment schedule, fluid gain between sessions, blood pressure, medicines, kidney function, and other medical conditions can all affect how you feel.
Common Dialysis Side Effects
The following are some of the more commonly reported problems in people receiving dialysis.
1. Low Blood Pressure
A sudden drop in blood pressure is one of the more common problems during hemodialysis.
It can happen when fluid is removed from the body faster than the circulatory system can adjust. You may feel dizzy, weak, lightheaded, sick, or unusually tired.
Your dialysis team checks your blood pressure during treatment for this reason. If you regularly experience these symptoms, tell them rather than simply trying to tolerate them. They may need to review your fluid removal rate, dry weight, medicines, or other parts of your treatment prescription.
2. Muscle Cramps
Leg or muscle cramps can occur during dialysis, particularly toward the end of a session.
Fluid removal and changes in the body’s fluid balance may contribute to cramping. Large amounts of fluid gained between dialysis sessions can also make fluid removal more challenging.
If cramps happen frequently, tell your dialysis team. They can look at your fluid removal and treatment plan instead of simply treating the cramp each time it happens.
3. Nausea and Vomiting
Some patients feel nauseated during or after dialysis. In some cases, nausea may occur alongside a drop in blood pressure. Kidney failure itself can also cause nausea, so the symptom isn’t automatically a side effect of dialysis.
Repeated vomiting shouldn’t be ignored, especially if you’re also experiencing dizziness, severe weakness, abdominal pain, fever, or difficulty breathing.
Your doctor can help determine what’s causing it and whether your dialysis prescription or medicines need to be reviewed.
4. Dizziness and Weakness
Feeling dizzy or weak during dialysis can be related to changes in blood pressure or fluid balance.
Some patients describe feeling particularly drained toward the end of treatment or shortly afterward. If this happens occasionally, your team may simply monitor it. If it’s becoming frequent or severe, mention it at your next dialysis session.
Don’t assume that feeling unwell is something you have to accept just because you’re on dialysis.
5. Fatigue After Dialysis
Fatigue is one of the symptoms many people on dialysis report.
You may feel tired after a session and need some time to recover before returning to your normal routine. Fatigue can also come from kidney disease itself, anemia, nutritional problems, other medical conditions, or the overall demands of long-term treatment.
This is why persistent tiredness deserves a proper discussion with your nephrologist rather than being automatically labelled as a dialysis side effect.
Your doctor may review your blood tests, nutrition, medicines, dialysis adequacy, sleep, and other possible causes.
6. Headache
Some people experience headaches during or after dialysis.
Headaches can have several possible causes, including changes in blood pressure or fluid balance. If headaches are frequent, severe, or different from what you normally experience, tell your healthcare team.
A sudden severe headache, particularly when accompanied by neurological symptoms or other serious symptoms, requires urgent medical assessment.
7. Itchy or Dry Skin
Itching is common among people with advanced kidney disease and those receiving dialysis. It isn’t always caused directly by the dialysis treatment.
Changes in mineral levels, dry skin, kidney disease itself, and other factors can contribute.
Simple skin care may help some people, but persistent itching should be discussed with your doctor. There may be an underlying cause that needs treatment.
8. Problems With Dialysis Access
For people receiving hemodialysis, vascular access is essential. This may be an arteriovenous fistula, graft, or catheter.
Access problems can include infection, blockage, poor blood flow, bleeding, or other complications. NIDDK notes that vascular access problems are an important cause of complications in people receiving hemodialysis.
Watch for:
- Redness or warmth around the access
- Swelling
- Increasing pain
- Drainage or pus
- Fever or chills
- Unusual bleeding
- A change in how the fistula or graft feels or works
Tell your dialysis team promptly if you notice any of these changes.
Hemodialysis Side Effects vs Symptoms of Kidney Failure
This distinction is important.
A person on dialysis may experience tiredness, itching, nausea, weakness, or muscle cramps. But these symptoms can also occur because of kidney failure itself or another health problem.
The National Kidney Foundation specifically notes that it can sometimes be difficult to determine whether symptoms such as fatigue and itching are caused by dialysis or the underlying kidney disease.
So if you develop a new symptom, don’t automatically stop or change your dialysis treatment. Tell your nephrologist or dialysis team so they can work out the likely cause.
Do Dialysis Side Effects Mean Something Is Wrong?
Not necessarily.
Some mild symptoms can occur even when dialysis is working as intended. But frequent, worsening, or severe symptoms deserve attention.
For example, occasional tiredness after treatment isn’t the same as severe weakness after every session. A brief muscle cramp isn’t the same as repeated painful cramps that are affecting your ability to complete treatment.
Your symptoms can provide useful information about how you’re tolerating dialysis.
Your dialysis team may review factors such as:
- Blood pressure before, during, and after treatment
- Weight gain between sessions
- Amount and rate of fluid removal
- Dialysis duration
- Medicines
- Blood test results
- Dialysis access
- Food and fluid intake
Sometimes a change in the dialysis prescription can reduce certain symptoms.
How Can Dialysis Side Effects Be Managed?
There isn’t one solution that works for every patient. Management depends on what’s causing the symptom.
If you regularly feel dizzy or weak, your doctor may review your blood pressure and fluid removal.
If you’re having cramps, your team may look at how much fluid needs to be removed and how quickly.
If you’re constantly tired, other causes such as anemia, inadequate nutrition, sleep problems, or other medical conditions may need to be checked.
Your role matters too. Follow your prescribed fluid and diet plan, take medicines as directed, and tell the dialysis team about symptoms instead of waiting for them to become severe.
Keeping track of when a symptom happens can also be useful. Note whether it occurs during dialysis, immediately afterward, or between sessions. That information can help your doctor identify patterns.
When Should a Dialysis Patient Seek Medical Help?
Some symptoms should not wait until your next routine appointment.
Contact your dialysis team promptly if you develop:
- Fever or chills
- Redness, warmth, swelling, pain, or drainage around your dialysis access
- Unusual or persistent bleeding
- New or worsening shortness of breath
- Significant changes in blood pressure
- Repeated vomiting
- Severe weakness or dizziness
- Problems with your dialysis access
- A missed or incomplete dialysis session
Seek emergency medical care for serious symptoms such as severe difficulty breathing, chest pain, fainting, or bleeding that does not stop.
If you’re unsure whether a symptom is serious, contact your healthcare team and explain what you’re experiencing.
Can Dialysis Side Effects Be Prevented?
Not every side effect can be prevented. But good dialysis care can reduce the risk of some problems.
One practical area is fluid management. Gaining a large amount of fluid between sessions can mean more fluid has to be removed during dialysis, which may make symptoms such as cramps, dizziness, or low blood pressure more likely.
Your recommended fluid intake isn’t the same for everyone. It depends on factors such as your urine output, weight, medical conditions, and dialysis prescription.
The same applies to diet. Your nephrologist and renal dietitian can give you individual advice about sodium, potassium, phosphorus, protein, and fluid intake.
Don’t copy another dialysis patient’s diet simply because it worked for them.
Living With Dialysis
Dialysis can change your routine, but it doesn’t mean that life has to stop.
Many people receiving dialysis continue working, travelling, spending time with family, and maintaining their usual activities. It may take time to find a routine that works around treatment days.
If fatigue is affecting your work or daily activities, tell your doctor. The goal isn’t simply to complete dialysis sessions. Your overall health and quality of life matter too.
If you’re struggling with dialysis, write down the symptoms you’re experiencing and when they occur. Take that information to your next appointment. A clear description often gives your nephrologist much more to work with than simply saying, “I don’t feel well after dialysis.
Frequently Asked Questions
What are the common dialysis side effects?
Common problems can include low blood pressure, muscle cramps, dizziness, nausea, weakness, headache, fatigue, itching, and problems related to dialysis access. Not every symptom is caused directly by dialysis.
What are the side effects of dialysis treatment?
The side effects of dialysis treatment can vary between patients. During hemodialysis, some people experience low blood pressure, muscle cramps, nausea, dizziness, headache, or fatigue. Access-related complications and infections can also occur.
Are hemodialysis side effects different for every patient?
Yes. People respond differently to treatment. Symptoms can depend on the type of dialysis, fluid removal, blood pressure, kidney function, medicines, other health conditions, and individual treatment needs.
Why do I feel tired after dialysis?
Fatigue after dialysis is common, but it isn’t always caused by dialysis itself. Kidney disease, anaemia, nutritional problems, sleep issues, medicines, and other medical conditions can also contribute. Persistent or severe fatigue should be discussed with your nephrologist.
Should I tell my doctor about dialysis side effects?
Yes. You should tell your dialysis team about new, persistent, worsening, or severe symptoms. Your doctor may be able to identify the cause and adjust your treatment if needed.
Final Takeaway
Dialysis is an important treatment for people whose kidneys can no longer remove enough waste and fluid from the body. Some patients experience side effects such as fatigue, cramps, low blood pressure, nausea, dizziness, or itching. Others may have very few symptoms.
The key is not to silently accept symptoms that are affecting your health or daily life. Tell your dialysis team what you’re experiencing, when it happens, and whether it’s getting worse. That gives your nephrologist a better chance of finding the cause and making your treatment safer and more comfortable.
Medically reviewed by Dr. Sashidhar CH, Nephrologist, Hyderabad | 20+ Years of Experience
This article is for general educational information and does not replace an individual medical consultation. Dialysis patients should follow the treatment, medication, diet, and fluid recommendations provided by their healthcare team.
