August 11, 2025
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9 min read

What Causes Lymphedema In Legs?

Written by:

Deborah Kellogg

August 11, 2025

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Lymphedema in the legs happens when there's a buildup of fluid, known as lymph. This happens when the lymphatic system, which is responsible for draining this fluid, isn't functioning as it should.

There are several reasons why this might happen, and we generally place them into two main groups: primary lymphedema, which is often inherited, and secondary lymphedema, which can result from various factors like injury or infection.

1. Primary Lymphedema: This type is pretty uncommon and is linked to genetic factors that influence how the lymphatic system develops.  Basically, it means someone is born with some differences in their lymphatic vessels or nodes. It can show up at any age, whether you're a baby or an adult, and sometimes it even runs in families.

  • Milroy's disease: Present at birth.
  • Meige disease (lymphedema praecox): It typically develops during puberty, when someone is pregnant, or up until they reach 35 years old.
  • Lymphedema tarda: Appears after age 35.

2. Secondary Lymphedema: This type is actually quite common and happens when the lymph system, which usually works just fine, gets damaged or blocked. In developed countries, some of the most common reasons for this include:

Cancer Treatment:

  • Surgery: Surgical procedures that involve removing lymph nodes from areas like the groin or pelvis—often due to cancers such as prostate, gynecological, or skin cancer—can affect how the lymphatic drainage works in your body.
  • Radiation Therapy: When radiation is directed at areas with lymph nodes, it can sometimes cause scarring and damage to those lymphatic vessels and nodes. This might affect how well they work.


Chronic Venous Insufficiency (CVI):
This is very common for the valves in our leg veins to not work as they should. When that happens, blood can start to pool in the legs. This can also put extra pressure on the lymphatic system, resulting in a condition called phlebolymphedema.


Infections:

  • Cellulitis: Severe bacterial skin infections can really disrupt your skin's health. They can cause inflammation and harm the lymph vessels, which might result in scarring and make it harder for the body to drain fluids properly.
  • Parasitic infections (e.g., Filariasis): In certain regions of the world, microscopic worms can invade our bodies and cause some serious blockages in the lymph nodes, which leads to severe lymphedema.

Trauma or Injury: If you've experienced an accident or had some serious bruising, it’s possible that you could end up with lymphedema, which is swelling due to damage to your lymphatic vessels.

Obesity: When we have extra fatty tissue, it can press against our lymph nodes and vessels, making it harder for our bodies to drain fluids properly.

Lack of Activity/Immobility: Leg muscles play a big role in keeping your lymph fluid flowing. When you contract those muscles, they help pump that fluid through your vessels. If you're sitting for too long without moving around, it can slow down this pumping action and cause fluid to build up.

Tumors: When a tumor starts to grow, it can sometimes block lymphatic vessels or nodes. This blockage can make it difficult for fluid to drain properly.

Other Medical Conditions:

  • Heart conditions: If you have conditions like congestive heart failure, you might notice some fluid retention, which can sometimes lead to lymphedema.
  • Kidney disease: When your kidneys aren't working as well as they should, it can cause your body to hold onto extra fluid. This might lead to lymphedema.
  • Inflammation: Chronic inflammatory conditions can have a negative impact on the lymphatic system.

Lymphedema can show up right after something like surgery, or it might not appear until years later. If you’re noticing that your legs are swelling and it doesn’t go away, it’s a good idea to consult with your doctor. They can help figure out what’s going on and the best way to manage it.

How do I get rid of lymphedema in my legs?

If you’re dealing with lymphedema in your legs, you’re not alone. It might feel overwhelming at times since it’s a long-term condition without a quick fix. With a bit of consistent care over time, you can help reduce swelling, feel more comfortable, prevent any complications, and really improve your overall quality of life.

The best way to address lymphedema is by using a mix of therapies, especially focusing on Complete Decongestive Therapy (CDT). It's really helpful when this therapy is provided by a certified lymphedema therapist who knows what they’re doing.

CDT is a vital part of managing lymphedema, and it includes two main phases:

Phase I: Intensive/Decongestion Phase

In this first phase, we’ll be all about helping to reduce swelling and boost your skin’s health.

  • Manual Lymphatic Drainage (MLD): Experience the soothing touch of a specialized massage technique delivered by a skilled therapist. Manual Lymphatic Drainage (MLD) helps guide lymph fluid away from swollen areas and encourages it to flow to healthier parts of your lymphatic system. Plus, your therapist will share some easy-to-learn Simple Lymphatic Drainage (SLD) techniques for you to try at home.
  • Compression Bandaging: Once you’ve had MLD, you'll notice that your leg is wrapped up in special multi-layered compression bandages. These bands help by applying steady pressure, which prevents fluid from accumulating again and helps the fluid that’s already there to move out of your leg. You’ll usually want to keep these on during most of the day and night.
  • Decongestive Exercises: Wearing those bandages while doing some specific exercises can really help get your leg muscles working. This action acts like a pump, which is great for boosting lymphatic drainage.
  • Meticulous Skin and Nail Care: Lymphedema can leave your skin a bit more sensitive and open to infections, so it’s very important to keep things clean and moisturized every day. This helps avoid dryness, cracks, and pesky infections like cellulitis.

Phase II: Maintenance Phase

Once the swelling goes down quite a bit, this long-term phase is all about helping you keep your limb size steady and stopping any fluid from coming back.

  • Compression Garments: You'll want to wear your comfy custom-fitted compression stockings or garments every day (and sometimes at night, too). They give you that steady pressure, which is very important for keeping up the great results you got from Phase I. Velcro wraps can be a great alternative to stockings.
  • Self-MLD (Simple Lymphatic Drainage): Keep on using those self-massage techniques your therapist shared with you.
  • Continued Exercise: Getting moving with regular physical activity is super important for keeping that lymph fluid flowing. Simple activities like walking, swimming, or cycling can do wonders.
  • Ongoing Skin Care: Keeping your skin clean and moisturized is really important for infection prevention.
  • Weight Management: Keeping a healthy weight is really important. Carrying extra weight can make lymphedema worse, and it’s a big factor to consider.

It's really important to consult with a healthcare professional, especially a certified lymphedema therapist. They can figure out what’s going on with your condition and create a treatment plan that’s just right for you. Plus, they’ll share handy self-management tips that can really make a difference in how you live with lymphedema.

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