The short answer
Lymphedema compression should be fitted and monitored. Too-tight or poorly used garments can cause problems.
Lymphedema Garments and Compression is a planning topic, not a diagnosis or treatment instruction by itself.
The next step depends on cancer type, report wording, symptoms, prior results, and treatment goals.
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The full explanation.
What a compression garment is doing
Lymphedema is swelling that builds up when lymph fluid cannot drain normally. After cancer surgery or radiation, lymph nodes and lymph vessels may be removed or scarred. Fluid then collects in an arm, a leg, the chest wall, the trunk, or the head and neck.
Compression does not cure that. It supplies outside pressure so the muscle pump can push fluid along. Take the garment off for a week and the limb usually refills. This is why compression is treated as daily equipment, not a short course.
Two phases, two different products
The National Cancer Institute describes complete decongestive therapy, or CDT, in two phases. Mixing them up is the most common reason people give up on compression.
Phase 1 is reduction. Skin and wound care, exercise, manual lymphatic drainage, and multilayer compression bandages, done daily for an average of 15 days. Bandages, not garments. The limb is shrinking, so a fitted garment ordered now would be the wrong size in two weeks.
Phase 2 is maintenance. Skin and wound care, exercise, manual lymphatic drainage as needed, and compression garments. Measurements are taken at the end of phase 1, when the limb has stopped changing.
A certified lymphedema therapist, often written as CLT, runs both phases. Ask for a referral by that title.
Flat knit or circular knit is a real decision
These are two ways of manufacturing the fabric, and NCI treats them differently.
Circular knit is made on a cylinder with no seam. It delivers more pressure at the narrow end of the garment. NCI notes it suits venous insufficiency better than it suits lymphedema.
Flat knit is made as a sheet and sewn, so it has a seam and can be built to any shape. It is stiffer and less elastic. NCI states that flat knit inelastic garments work better than elastic compression in both the reduction and the maintenance phase of stage II and stage III lymphedema.
Elastic garments still have a place. NCI lists them for stage I lymphedema, and for lymphedema that has been brought back to stage II after complete decongestive therapy.
The staging behind those choices is the International Society of Lymphology system. Stage 0 means lymph transport is already impaired with no visible swelling. Stage I is soft pitting swelling that goes down overnight or with elevation. Stage II swelling stays despite elevation, and the tissue starts to harden, which is called induration. Stage III means heavy nonpitting swelling with thick skin and deep folds.
Night garments are a separate item
Daytime garments are firm and thin. Night garments are bulky, quilted, foam-filled pieces designed for a limb at rest, when there is no muscle pump working. They are not interchangeable, and they are billed separately.
Pneumatic pumps and the 60 mm Hg line
An intermittent pneumatic compression pump uses inflating chambers in a sleeve. NCI records a specific caution here. There is a theoretical concern that pressures above 60 mm Hg, and long-term use, may injure lymphatic vessels. If a pump is part of your plan, ask what pressure setting is programmed and write it down.
What Medicare covers since January 1, 2024
This changed recently, and many people still assume garments are out of pocket. Section 4133 of the Consolidated Appropriations Act, 2023 created a Medicare benefit for lymphedema compression treatment items, effective January 1, 2024.
Covered categories include standard daytime gradient compression garments, custom daytime garments, nighttime garments, gradient compression wraps, compression bandaging systems and supplies, and accessories such as zippers, linings, paddings, or fillers.
The quantity limits are specific:
- Three daytime gradient compression garments or wraps per affected body part, once every 6 months
- Two nighttime garments per affected extremity, once every 2 years
- Both a daytime and a nighttime garment may be billed for the same body part
Claims above those limits are denied unless a replacement is needed because medical need changed, or because an item was lost, stolen, or damaged beyond repair. Suppliers bill those with the RA modifier.
Cost is not zero. The Part B deductible and coinsurance apply, and Medicare pays 80 percent of the lesser of the supplier's actual charge or the national DMEPOS fee schedule amount.
Measuring, and what counts as a change
Ask what numbers are being tracked. NCI cites two common yardsticks for the arm. A circumference difference of 2 cm or more at any single point, compared with the unaffected arm, is considered clinically meaningful by some experts. A volume difference of 200 mL or more between arms is the usual cutoff.
Keep your own tape measurements with dates. A garment that has stretched out will show up as creeping numbers before it shows up as an obvious problem.
Skin care, because the garment sits on skin all day
NCI's skin rules for a limb at risk are concrete. Wear gloves for cooking and gardening. Use lotion so skin does not crack, since cracks let bacteria in. Ask your doctor about antibacterial ointment for any burn or cut. Wear loose clothing with no tight bands. Do not carry a handbag on the affected arm. Do not let anyone take blood pressure on that limb. Avoid extreme heat and sun exposure.
For caregivers, the useful jobs are steady ones. Help with donning, which is the hardest part for a stiff shoulder. Check the skin under the garment every evening. Track the reorder dates against the Medicare windows above.
When to call today
Cellulitis is a skin infection that moves fast in a lymphedematous limb. NCI warns that untreated cellulitis can become life-threatening.
Call 911 or go to an emergency department if the redness spreads visibly over hours, or if it comes with shaking chills, confusion, slurred speech, a pounding heart, breathlessness, or barely any urine. That picture is sepsis and it needs treatment within the hour, not an appointment.
Otherwise, call the same day for:
- Redness, warmth, tenderness, or pain in the swollen area
- Fever along with any of the above
- A new 2 cm or greater jump in circumference at a point you usually track
- Numbness, tingling, blue or white fingers or toes, or a garment that leaves deep grooves in the skin
Do not put a compression garment back on a limb that has new spreading redness until the team says it is safe.
Sources
https://www.cancer.gov/about-cancer/treatment/side-effects/lymphedema/lymphedema-hp-pdq
https://www.cancer.gov/about-cancer/treatment/side-effects/lymphedema/lymphedema-pdq
https://www.cms.gov/files/document/mm13286-lymphedema-compression-treatment-items-implementation.pdf
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Sources last checked: 2026-08-13 what this meansLast updated: 2026-08-13Next planned review: 2028-07-21
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How this page was created
Cancer Explained does not originate medical claims. Every page restates guidance already published by the National Cancer Institute, the CDC, the USPSTF and the FDA, in plain language, with the source cited so you can check the original yourself. AI does the translating and organizing; automated checks test claims, citations, clarity and safety before anything publishes. We do not employ clinicians and do not intend to — our work is translation and navigation, not clinical judgment. Nothing here is personal medical advice, and no page can account for your particular situation.
Editorial status: Source checked — This page was written with AI assistance and checked line by line against the sources listed on it. That confirms the sources support what the page says. It is not a medical review, and it does not confirm the page is complete or right for your situation.
Human medical review: not completed. Pages here are not signed off by a clinician before they publish. That is not an oversight we are quietly working around: we restate published guidance and cite it, so the authority belongs to the source rather than to us, and every page names where its claims come from — you can verify us instead of trusting us. Where a volunteer clinician has reviewed a page, their name and credentials appear on it; where no name appears, no clinician has checked it. We are glad to have reviewers and are recruiting them, and we do not hold pages back waiting for one. Use this site to understand your situation and to ask better questions of the people treating you.
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