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Lymphoedema is a long-term (chronic) condition that causes swelling in the body's tissues. It can affect any part of the body, but usually develops in the arms or legs.
It develops when the lymphatic system doesn't work properly. The lymphatic system is a network of channels and glands throughout the body that helps fight infection and remove excess fluid.
It's important that lymphoedema is identified and treated as soon as possible. If it isn't treated, it can get worse.
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The main symptom of lymphoedema is swelling in all or part of a limb or another part of the body. It can be difficult to fit into clothes, and jewellery and watches can feel tight.
At first, the swelling may come and go. It may get worse during the day and go down overnight. Without treatment, it will usually become more severe and persistent.
Other symptoms in an affected body part can include:
Lymphoedema is caused by a problem with the lymphatic system, a network of vessels and glands spread throughout the body. The main functions of the lymphatic system are helping fight infection and draining excess fluid from tissues.
There are two main types of lymphoedema:
Read more about the causes of lymphoedema.
Lymphoedema is thought to affect more than 200,000 people in the UK. Primary lymphoedema is rare and is thought to affect around 1 in every 6,000 people. Secondary lymphoedema is much more common.
People who have treatment for melanoma in the lymph nodes in the groin can also get lymphoedema. Research has shown around 20-50% of people are affected.
Your treatment team will let you know if you're at risk of getting lymphoedema from your cancer or cancer treatment. Any planned treatment you have will try to avoid causing damage to your lymph nodes.
The Cancer Research UK website has more information about lymphoedema and cancer.
See your GP if you experience the typical symptoms of lymphoedema, such as swelling in your arms and legs. They may refer you to a specialist lymphoedema treatment centre for further assessment.
In many cases, lymphoedema can be diagnosed from your symptoms and medical history, and by examining the affected body part and measuring the distance around it to see if it's enlarged.
Occasionally, further tests may be necessary to assess and monitor your condition.
Read more about diagnosing lymphoedema.
There's no cure for lymphoedema, but it's usually possible to control the main symptoms using techniques to minimise fluid build-up and stimulate the flow of fluid through the lymphatic system.
These include wearing compression garments, taking good care of your skin, moving and exercising regularly, having a healthy diet and lifestyle, and using specialised massage techniques.
Cellulitis is the most common complication of lymphoedema. It can also have a significant psychological impact.
If you have lymphoedema, the build-up of fluid in your tissues makes you more vulnerable to infection.
Cellulitis is a bacterial infection of the deep layer of skin (dermis) that often affects people with lymphoedema. Cellulitis can also sometimes cause lymphoedema.
Symptoms of cellulitis can include:
Antibiotics taken by mouth (orally) can usually be used to treat cellulitis, although severe cases may need to be treated in hospital with antibiotics given directly into a vein (intravenously).
Living with a long-term condition that affects your appearance can cause a great deal of distress and lead to periods of depression.
You may be depressed if you've been feeling down for the past few months and no longer find pleasure in things you usually enjoy.
If this is the case, talk to your GP or a member of your lymphoedema treatment team. Effective treatments are available for depression.
Talking to other people with lymphoedema can be reassuring and decrease feelings of isolation, stress and anxiety.
The Lymphoedema Support Network provides information and advice, and can put you in touch with a support group in your area.
Remember: if you persevere with your treatment plan, your symptoms should eventually become less noticeable.
There are two types of lymphoedema – primary and secondary lymphoedema – which have different causes.
The main causes of each type of lymphoedema are outlined below.
Primary lymphoedema is caused by alterations (mutations) in genes responsible for the development of the lymphatic system.
The "faulty" genes cause the parts of the lymphatic system responsible for draining fluid to not develop properly or not work as they should.
Primary lymphoedema often runs in families, although not every child born to someone with the condition will develop it themselves.
Secondary lymphoedema develops in people who previously had a normal lymphatic system that then becomes damaged.
It can have a number of different causes. Some of the most common causes are explained below.
Treatment for cancer can involve surgery to remove sections of the lymphatic system.
The surgeon will try to limit damage to your lymphatic system, although this isn't always possible. There's a particular risk of lymphoedema occurring after treatment for any cancer where lymph glands are removed.
Some of the more common cancers where this happens are:
If radiotherapy is needed to destroy cancerous cells in your lymphatic system, there's a risk that the lymphatic system could become permanently damaged and unable to drain fluid properly.
An infection, such as cellulitis, can sometimes cause lymphoedema. Severe cellulitis can damage the tissue around the lymphatic system, causing it to become scarred.
Filariasis is another infectious cause of lymphoedema. Lymphatic filariasis is a parasitic disease caused by microscopic, thread-like worms.
The adult worms only live in the human lymphatic system and block lymph drainage. It's a common cause of lymphoedema worldwide, but it isn't generally a risk in the UK.
Medical conditions that cause tissue to become red and swollen can also permanently damage the lymphatic system.
Conditions that can cause lymphoedema include:
Diseases that affect the flow of blood through the veins can cause lymphoedema in some people.
The abnormal or damaged veins can cause fluid to overflow from the veins into the tissue spaces. This overwhelms and eventually exhausts the parts of the lymphatic system responsible for draining this fluid.
Some venous diseases that can lead to lymphoedema include:
Obesity is another possible cause of secondary lymphoedema. People who are obese, particularly those who are severely obese, have an increased risk of developing swollen body parts.
It's not clear exactly why this is, but it's been suggested that the extra fatty tissue affects the lymphatic channels in some way, reducing the flow of fluid through them.
In these cases, weight loss is an important part of treatment and even just starting to lose weight can make a big difference to the swelling.
In a small number of cases, lymphoedema can be caused by an accidental injury to the lymphatic system.
For example, it can sometimes occur after a road traffic accident where there's extensive bruising or soft tissue loss.
Movement and exercise help lymph drainage because muscle activity surrounding the lymphatic vessels massages fluid into and along them.
Reduced movement can therefore lead to lymphoedema because the fluid in the lymphatic system doesn't get moved along.
For example, people who have limited mobility for a long period of time as a result of an illness, nerve damage or arthritis may be at risk of lymphoedema.
If you're being treated for cancer and are at risk of developing lymphoedema, you'll be monitored for the condition afterwards. Otherwise, see your GP if you experience symptoms of swelling.
In many cases, it's possible to diagnose lymphoedema by:
Your GP may refer you to a specialist lymphoedema treatment centre for further assessment.
In most cases, further tests aren't necessary, but they may occasionally be used to assess and monitor your condition. The tests are explained below.
In some cases, tests to calculate the volume of an affected limb may be carried out.
These may include:
During a bioimpedance test, small metallic discs called electrodes are placed on different parts of your body.
The electrodes release a small, painless electric charge that's measured using a handheld device. Changes in the strength of the current can indicate the presence of fluid in your tissue.
Imaging tests may also be used to help diagnose and monitor lymphoedema.
These scans can be used to create a clearer picture of the affected tissue.
The recommended treatment for lymphoedema is decongestive lymphatic therapy (DLT).
DLT isn't a cure for lymphoedema, but it can help control the symptoms. Although it takes time and effort, the treatment can be used to bring lymphoedema under control.
There are four components to DLT:
Each of these components is described in more detail below.
DLT is an intensive phase of therapy, during which you may receive daily treatment for several weeks to help reduce the volume of the affected body part.
This is followed by a second phase called the maintenance phase. You'll be encouraged to take over your care using simple self-massage techniques, wearing compression garments, and continuing to exercise.
This treatment phase aims to maintain the reduced size of the affected body part.
You'll have reviews every few months to check how your treatment is progressing.
Unlike blood circulation, the lymphatic system has no central pump, such as the heart, to move fluid to the lymph glands.
Instead, it uses the massaging effect of surrounding muscles to move the fluid. This is why exercise is important.
Compression bandages or garments, such as sleeves, gloves, stockings or tights, fitted over affected limbs act as a counterforce to muscles.
This stimulates more effective lymph drainage. The combination of exercise and compression encourages the fluid to move out of the affected limb.
Compression garments may also be applied after a massage session to prevent fluid accumulating in the limb again.
Velcro wraps may be used instead of bandages or compression garments. These are easier to apply yourself.
You'll be taught how to correctly apply compression garments or Velcro wraps so you can continue using them during the maintenance period.
It's important to take good care of your skin to reduce your risk of developing an infection, such as cellulitis.
See preventing lymphoedema for more skin care advice.
Your lymphoedema care team will help devise an exercise and movement plan designed to strengthen and stimulate the muscles involved in lymph drainage.
They'll also help you lose weight if you're overweight. Your exercise plan will be tailored to your requirements and ability.
To begin with, you may receive specialised massages called manual lymphatic drainage (MLD) – usually carried out by a specialist therapist – to move fluid from the swollen areas into working lymph nodes, where it can be drained.
Your lymphoedema therapist will also teach you a range of simpler massage techniques that you or your carer can use during the maintenance phase of treatment to help keep the swelling down. These self-massage techniques are known as simple lymphatic drainage (SLD).
In a small number of cases, surgery may be used to treat lymphoedema. There are three main types of surgery that may be useful for the condition:
These treatments may help reduce the size of areas of the body affected by lymphoedema, but some are still being evaluated – particularly lymphaticovenular anastomosis – and aren't in widespread use.
The accumulation of fat is a significant feature of lymphoedema swelling. Liposuction is where a thin tube is inserted through small cuts (incisions) in the skin to suck fat out of tissue.
It can be used to remove excess fat from an affected limb to help reduce its size.
After surgery, you'll have to wear a compression garment on the affected limb day and night for at least a year to help keep the swelling down.
The National Institute for Health and Care Excellence (NICE) states liposuction for long-term (chronic) lymphoedema appears to be safe, and may be effective in the short term.
However, there isn't enough evidence of its long-term effectiveness and safety.
Access to liposuction for lymphoedema may be limited, depending on what's available from your local clinical commissioning group (CCG).
It's not possible to completely prevent lymphoedema, but the following advice may help reduce your chances of developing it.
If you already have lymphoedema, this advice may stop it getting worse.
The part of your body affected by lymphoedema is more vulnerable to infection of the build-up of fluid within the tissues.
Any cuts in your skin can allow bacteria to enter your body and may quickly develop into an infection.
Skin infections can also damage your lymphatic system and cause lymphoedema to develop.
You can reduce your chances of developing skin infections by:
Contact your GP as soon as possible if you develop symptoms of a possible skin infection, such as redness and a feeling of heat in the skin.
Adopting a healthy lifestyle may help reduce your risk of developing lymphoedema, and may also help control the condition if you already have it.
Read more about how to lose weight.