What Is Lymphedema?

Lymphedema is swelling due to build-up of lymph fluid in the body. Lymph nodes act like a drain in your sink. If the drain is clogged, the fluid cannot drain. It usually happens in the arms or legs, but can occur in other parts of the body. Lymph fluid is part of the lymph system that carries fluid and cells that help fight infections throughout the body. Sometimes this swelling develops quickly, or it may develop slowly over several months.

What Causes Lymphedema?
Lymphedema can be caused by cancer or by cancer treatment.

• Sometimes a cancerous tumor can get big enough to block the lymph system.
• Surgery to remove cancer may also remove lymph nodes or some of the vessels that carry the lymph fluid. This can cause the fluid to build up in surrounding tissues.
• Radiation treatment can damage the lymph vessels, resulting in too much lymph fluid in the tissues.

Can Lymphedema Be Prevented?
Before you have surgery or radiation treatment for cancer, ask your doctor what can be done to lower the chances that you will get lymphedema.

What Are the Symptoms of Lymphedema? 
The symptoms of lymphedema may include—

• Your arm, leg, or other part of your body has a little swelling at first, but gets bigger over time.
• The skin in that area feels tight, and sometimes has a tingling sensation.
• The arm or leg with lymphedema feels heavy.
• Clothing and jewelry fit more tightly on the affected area.
• The skin looks thicker or leathery.

If you notice any swelling after cancer treatment, talk to your doctor about what is causing it and how best to treat it.

What Health Problems Can Lymphedema Cause?

• Lymphedema raises your risk of getting an infection in the swollen area. This happens because the cells that prevent infection can’t reach that part of your body.
• Wounds may heal more slowly on the part of your body that has lymphedema.
• You may feel upset, depressed, embarrassed, or angry about the lymphedema.
• The joints in the part of the body with lymphedema may feel stiff or sore.

How Is Lymphedema Treated?
At this time, there is no cure for lymphedema. The goal of treatment is to reduce the swelling or keep it from getting worse, and to relieve symptoms. Your doctor can help you figure out which treatments are best for you.

Lymphedema can be treated with—
Exercise. Moving your swollen arm or leg may help the lymph fluid to drain, thus reducing the swelling.

A compression sleeve or stocking. This garment fits tightly on your swollen arm or leg, helping the lymph fluid flow out.

Massage therapy. A special kind of massage called manual lymph drainage can help push the lymph fluid out of the swollen part of your body.

A pneumatic pump. A machine inflates a sleeve that you place on your swollen arm or leg, helping lymph fluid flow out.

Weight loss. In patients who are overweight, lymphedema related to breast cancer may improve with weight loss.

Surgery. If your lymphedema is severe, your doctor may suggest that you get an operation. Several options are available.

For more information, visit Johns Hopkins Medicine’s Lymphedema: What Are Your Surgical Options?

Cancer treatment. If a cancerous tumor is causing lymphedema, the cancer is treated.

ref. to source
https://www.cdc.gov/cancer/survivors/patients/lymphedema.htm