Feeling cold all the time is not a classic warning sign of cancer, and in most cases it points to something far more common, like anemia from iron deficiency, an underactive thyroid, or simply being underweight. That said, certain cancers can make you feel persistently cold or cause recurring chills, usually through indirect mechanisms like disrupting your blood cell production, triggering inflammation, or altering your metabolism.
If feeling cold is your only symptom with no other changes, cancer is low on the list of likely explanations. But understanding how and why some cancers do affect body temperature can help you recognize when cold sensitivity deserves a closer look.
How Cancer Can Make You Feel Cold
Cancer doesn’t typically lower your body temperature the way a cold room does. Instead, it can disrupt the systems your body relies on to stay warm. The three main pathways are anemia, inflammation, and muscle or fat loss.
Many cancers reduce your red blood cell count, either by invading the bone marrow (where blood cells are made) or by causing chronic internal bleeding. Red blood cells carry oxygen to your tissues, and when oxygen delivery drops, your body prioritizes vital organs over your extremities. The result: cold hands, cold feet, and a general sense of being chilled. Blood cancers like leukemia and lymphoma are the most direct culprits here, but cancers of the colon, stomach, and kidneys can also cause anemia over time.
Inflammation is the second pathway. Tumors release inflammatory signaling molecules, particularly ones called TNF-alpha and IL-6, that interfere with red blood cell production and can act on the brain’s temperature-regulation center. These are the same molecules your body produces during a fever, which is why some cancer patients cycle between feeling flushed and feeling intensely cold. Researchers studying breast cancer survivors found that these inflammatory signals may drive persistent feelings of being chilled, even after treatment ends, through the same biological mechanism that makes you shiver when a fever is building.
Weight Loss, Muscle Wasting, and Heat
Your body generates heat in two main ways: through muscle activity and through fat tissue that burns calories to produce warmth. Advanced cancer can strip away both of these heat sources through a process called cachexia, a progressive, involuntary weight loss that affects up to half of all cancer patients at some point in their illness.
In cachexia, tumors release signaling molecules that actively reprogram your fat cells. Normal fat stores, which act as insulation, get converted into a type of tissue that burns energy rapidly rather than storing it. This sounds like it would produce more heat, and at the cellular level it does, but the net effect is that your body’s fat reserves are depleted far faster than they should be. You lose the insulating layer under your skin that helps retain warmth. At the same time, tumors trigger muscle atrophy through related mechanisms. Less muscle mass means less heat generated through normal daily movement.
Patients with metastatic colorectal and lung cancers who show signs of cachexia have been found to have elevated metabolic rates and reduced lean body mass. In practical terms, their bodies are burning through energy stores without being able to maintain weight or warmth.
Cancers Most Linked to Chills
Blood cancers are the ones most commonly associated with feeling cold or having chills. Leukemia symptoms often include chills alongside fever, fatigue, swollen lymph nodes, night sweats, loss of appetite, and recurring infections. The chills happen both because leukemia crowds out healthy blood cell production and because the cancer itself triggers inflammatory responses.
Lymphoma, both Hodgkin and non-Hodgkin types, produces chemicals that raise body temperature slightly, leading to a distinctive pattern of low-grade fever, chills, daytime sweating, and drenching night sweats. This cycling between hot and cold is sometimes called “B symptoms” and is significant enough that doctors use it to help stage the disease. If you’re experiencing unexplained cycles of chills and sweats, especially with swollen lymph nodes or unintentional weight loss, that combination is worth bringing to your doctor promptly.
Thyroid cancer deserves a mention for a different reason. The cancer itself doesn’t usually cause cold intolerance, but treatment for thyroid cancer often involves removing part or all of the thyroid gland. Since the thyroid controls your metabolic rate, losing thyroid function makes cold intolerance very common. Hypothyroidism symptoms include feeling cold, fatigue, hair thinning, dry skin, and puffiness in the face or legs.
Chemotherapy and Cold Sensitivity
If you’re already being treated for cancer, feeling unusually sensitive to cold may be a side effect of treatment rather than the cancer itself. One chemotherapy drug, oxaliplatin (used for colorectal and other solid tumors), is notorious for causing acute cold hypersensitivity in nearly all patients who receive it. This can begin after the very first infusion.
The sensation is different from simply feeling chilly. Patients describe painful, abnormal reactions to cold temperatures, predominantly in the hands and feet. Touching cold objects or drinking cold liquids can trigger sharp tingling or pain. This happens because the drug alters how nerve fibers in the skin respond to temperature signals. Several other chemotherapy classes, including platinum-based drugs, taxanes, and vinca alkaloids, can cause related forms of nerve damage that affect temperature perception.
This type of cold sensitivity is a recognized side effect with a known cause, so if it develops during treatment, your oncology team will already be watching for it.
More Common Causes to Rule Out First
Before worrying about cancer, it’s worth knowing that several very common conditions cause cold intolerance and are far more likely explanations.
- Iron-deficiency anemia is the most frequent cause of feeling cold, especially in women with heavy menstrual periods or people with low dietary iron intake. A simple blood test can identify it.
- Hypothyroidism slows your metabolism and reduces heat production. It affects roughly 5% of adults and is easily detected with a thyroid function test.
- Low body weight or low muscle mass reduces your body’s ability to generate and retain heat, regardless of the cause.
- Poor circulation from conditions like Raynaud’s phenomenon or peripheral artery disease can make your hands and feet feel cold even when the rest of your body is warm.
- Diabetes can damage peripheral nerves over time, leading to cold sensations in the extremities.
When Cold Sensitivity Points to Something Serious
Feeling cold on its own is unlikely to be cancer. What matters is the company it keeps. Pay attention if persistent cold feelings appear alongside unexplained weight loss (more than 10 pounds without trying), drenching night sweats, recurring fevers without an obvious infection, extreme fatigue that doesn’t improve with rest, or swollen lymph nodes you can feel in your neck, armpits, or groin.
That cluster of symptoms, not cold sensitivity alone, is what raises the index of suspicion for blood cancers or other malignancies. A complete blood count and basic metabolic panel can screen for anemia, thyroid dysfunction, and blood cell abnormalities in a single office visit, giving you and your doctor a clear starting point.