After head and neck cancer treatment, quite a few people feel a heavy swelling in the neck, under the jaw, or on one side of the face. You look in the mirror in the morning and your facial contour has collapsed, or your neck feels so stiff that a shirt button feels uncomfortably tight. This is lymphedema. In areas where lymph nodes were removed by surgery or that received radiation, the channels for lymph fluid to drain become narrow, so fluid that cannot flow out pools there. It is not that the disease has returned, nor that you have gained weight, so there is no need to be too alarmed. That said, left alone it can gradually harden and become more uncomfortable, so managing it steadily in daily life matters.
When swelling appears, you may want to knead it hard with your hands, but pressing firmly actually does more harm than good. Lymph flows just beneath the skin, in a shallow layer, under very light pressure. That is why the manual lymphatic drainage (MLD) taught by specialist therapists is, at its core, done gently, like sweeping with a feather. If the face or neck is swollen, first gently stimulate the lymph nodes on the normal side of the neck and above the collarbone - not the swollen side - to open the "drain," and then slowly sweep the swollen area in that direction. At first it is best to learn the exact method once from a hospital rehabilitation medicine department or a lymphedema specialist therapist. Following along clumsily from the internet and getting the direction backwards can leave it ineffective or even more uncomfortable.
Everyday habits make a bigger difference than you might think. Propping up an extra pillow when you sleep so your head is slightly raised can reduce fluid pooling in the face overnight. People who have less puffiness in the morning often owe much to this. Avoid tight shirt collars, neckties and heavy necklaces that squeeze the neck, and be careful with very hot saunas or long spells in the sun, which encourage swelling. Cutting back on salty food helps too. If the skin on the swollen side cracks or gets injured, it is prone to infection, so shave gently and moisturize thoroughly. Since a single small wound spreading into cellulitis can sharply worsen the swelling, skin care really is the most basic of basics.
Movement is medicine too. If you keep the neck still because it is swollen, it stiffens up more. Within a comfortable range, slowly turn your head side to side, nod up and down, and do light shrugs of the shoulders a few times a day - the muscle pump helps the lymph flow. Abdominal breathing, drawing breath in deeply and exhaling slowly, is surprisingly effective too, because the large lymphatic duct deep in the chest moves with your breathing and acts as a pump. There is no need to make a production of it; do it in spare moments, while watching TV or waiting at a traffic light. If you also have trouble swallowing or speaking, combining it with speech-rehabilitation exercises helps with swelling management as well.
Still, keep one thing firmly in mind. If the swelling suddenly worsens rapidly, or one side turns red and hot, with fever and pain, it may be a sign of infection rather than simple swelling. In that case, do not try to ride it out alone with massage; go to the hospital right away. Also, if you feel a new lump in the neck unlike before, or the pattern of swelling changes markedly, it is safer to consult your care team. Lymphedema is less about a cure and more like a chronic condition you learn to live with well for life. Do not be impatient; start with small habits - one gentle sweep today, one extra pillow under your head. If you keep at it, it will surely become much more comfortable.
This article is general information only, and your own physical condition is, in the end, best known by the doctor who has seen you in person. Before you have new symptoms or change your management approach, be sure to talk with your care team first.