Can Anaemia Make You Feel Cold? | Chills Explained Safely

Yes, low hemoglobin can reduce heat delivery to your skin and muscles, so you may feel cold even when others feel fine.

Feeling cold all the time can be more than a preference for sweaters. If you’re shivering in a room that seems normal, anaemia is one possible reason, and it’s common enough that it’s worth checking.

You’ll learn why anaemia can make you feel chilly, which signs tend to travel with it, and how clinicians figure out the cause so treatment fits the real problem.

Why anaemia can make you feel cold

Your body makes heat and then moves it around through blood flow. Anaemia means you don’t have enough healthy red blood cells, or you don’t have enough hemoglobin inside them. Hemoglobin carries oxygen.

When oxygen delivery drops, you may generate less heat, and your body may shift blood flow toward core organs and away from skin. That’s one reason hands and feet can feel icy.

Cold hands and feet vs. whole-body chills

Cold hands and feet often come from reduced blood flow to the skin. Whole-body chills can show up when low oxygen delivery leaves you tired and less active, so you’re making less muscle heat.

Cold intolerance can have more than one cause

“Cold intolerance” means you feel unusually sensitive to cold temperatures. Anaemia is one cause, but it’s not the only one. MedlinePlus lists anaemia among causes and outlines how symptoms and tests guide next steps.

See the MedlinePlus overview of cold intolerance for the wider list.

Signs that your “cold” feeling might be anaemia

Feeling cold is rarely the only clue. Anaemia often brings a cluster of signs that build slowly, so it can take time to spot the pattern.

Symptoms people often notice

• Low energy or fatigue
• Shortness of breath with stairs or brisk walking
• Lightheadedness, especially when standing up
• Pale skin, pale nail beds, or pale inside the lower eyelid
• Fast heartbeat or feeling your heart thump

Clues that can hint at low iron

Iron deficiency can come with brittle nails, hair shedding, sore tongue, or cravings to chew ice. Heavy menstrual bleeding is a common trigger in people who menstruate. Blood loss from the stomach or bowel can also drive it.

The NHS outlines symptoms, testing, and treatment on its page about iron deficiency anaemia.

Can Anaemia Make You Feel Cold? What drives it and what to check

Anaemia is a label, not a single condition. The “why” matters because the fix depends on the cause. Clinicians often start with a complete blood count (CBC), then add targeted tests based on your history and those first results.

Iron deficiency anaemia

This is the most common form. Low iron means your body can’t make hemoglobin well, so oxygen delivery falls. Feeling cold can be part of that picture, along with fatigue and shortness of breath.

Vitamin B12 or folate deficiency anaemia

Vitamin B12 and folate help your body make red blood cells. If either is low, red blood cell production slows and the cells can become larger and fewer. People with vitamin B12 deficiency may also notice tingling, numbness, balance changes, or memory issues.

The NIH Office of Dietary Supplements has a consumer page on vitamin B12 with risk groups and food sources.

Anaemia linked to long-term illness

Some illnesses affect how your body uses iron and how it makes red blood cells. In this type, iron can be present in the body but harder to access for making hemoglobin, so lab patterns matter.

Blood loss and rapid drops in hemoglobin

Slow blood loss can creep up. Fast blood loss is different. A sudden drop can cause marked weakness, fainting, and cold clammy skin. Black, tarry stools, vomiting blood, or bleeding that soaks pads quickly needs urgent medical care.

When feeling cold is a red flag

Seek same-day help if you have chest pain, fainting, trouble breathing at rest, confusion, blue lips, or a heartbeat that feels irregular or racing. These can signal low oxygen delivery or another condition that needs quick assessment.

How clinicians figure out the cause

The goal is to confirm anaemia and find the reason, not just raise the hemoglobin number. The CBC gives hemoglobin, hematocrit, and red blood cell indices. Those indices can point toward iron deficiency, vitamin B12 or folate deficiency, or other patterns.

Common add-on tests include ferritin (iron stores), transferrin saturation, vitamin B12, folate, and a reticulocyte count (how fast new red blood cells are being made). In some cases, clinicians also check thyroid tests and kidney function.

Possible reason for feeling cold	Clues that often show up	What clinicians commonly check next
Iron deficiency anaemia	Fatigue, pale skin, shortness of breath, ice cravings, heavy periods	CBC, ferritin, iron studies, evaluation for blood loss
Vitamin B12 deficiency anaemia	Fatigue plus tingling, numbness, balance trouble, sore tongue	CBC with indices, vitamin B12, sometimes methylmalonic acid
Folate deficiency anaemia	Fatigue, mouth sores, low folate intake	Folate level, diet review, medication review
Anaemia linked to long-term illness	Known chronic condition, mixed lab picture	Iron studies pattern, kidney tests, inflammation markers
Thyroid underactivity	Cold intolerance, weight gain, constipation, dry skin	TSH and free T4 blood tests
Poor circulation	Cold fingers or toes, color changes, pain with cold exposure	History, exam, vascular tests when needed
Low calorie intake or low body weight	Feeling cold, low energy, missed periods	Diet history, weight trend, basic labs
Acute blood loss	Sudden weakness, dizziness, cold clammy skin, visible bleeding	Urgent evaluation, repeat hemoglobin, source control

Ways to feel warmer while treatment starts

Testing and treatment can take time. These steps can take the edge off without masking serious symptoms.

Warmth tactics that help

• Layer your core first. A warm torso often means warmer hands and feet.
• Move in short bursts. A five-minute walk can raise muscle heat.
• Use a warm drink for comfort, and limit caffeine if palpitations are an issue.
• Warm your bed before sleep with a hot water bottle, used safely.

Food steps that match common deficiency patterns

Food can help when low intake is part of the story. If iron deficiency is likely, aim for iron-rich foods plus vitamin C sources that help absorption. If vitamin B12 intake is low, focus on animal foods or fortified choices.

The NIH Office of Dietary Supplements page on iron covers food sources, daily needs, and safety notes.

Iron choices and simple pairings

• Heme iron: beef, lamb, sardines, clams, mussels.
• Non-heme iron: beans, lentils, tofu, spinach, pumpkin seeds.
• Pair plant iron with vitamin C: citrus, kiwi, peppers, tomatoes.
• Keep tea and coffee away from iron-rich meals if you’re working on iron status.

Vitamin B12 choices and common pitfalls

Vitamin B12 is naturally found in animal foods. Many fortified foods also contain it. Absorption can drop with age or stomach conditions, so diet alone may not fix it for everyone.

Food choice	Nutrient focus	Practical note
Clams, mussels, sardines	Iron, vitamin B12	Raises both nutrients in one meal
Lean red meat (small portions)	Heme iron, vitamin B12	Absorbs well; choose cuts you enjoy
Eggs and dairy	Vitamin B12	Useful for vegetarians who eat animal products
Lentils, chickpeas, beans	Non-heme iron	Pair with vitamin C foods at the same meal
Spinach, kale, broccoli	Folate plus some iron	Pairing still helps; cook to shrink volume
Fortified cereal or fortified plant milk	Vitamin B12, sometimes iron	Check the label for amounts per serving
Pumpkin seeds, sesame, tahini	Non-heme iron	Easy add-ons to salads, oats, or yogurt

Supplement safety and treatment basics

Supplements can help, but dosing should match your labs and your cause. Too much iron can be harmful, and iron tablets are a poisoning risk for children. Keep them stored safely and follow dosing guidance from a clinician.

Iron deficiency is often treated with iron tablets for a set period, then repeat labs. Some people need IV iron if tablets cause stomach issues or absorption is poor. If the cause is bleeding, treatment also needs to stop the bleeding, not just replace iron.

Vitamin B12 deficiency is treated with oral B12 or injections, depending on the cause. If absorption is the issue, injections may be used early on.

Special situations that change the plan

Anaemia can show up at any age, and a few situations change what clinicians look for first.

Pregnancy and after delivery

During pregnancy, blood volume rises and iron needs climb. Feeling cold can blend in with fatigue, so routine blood tests matter. After delivery, blood loss can drop iron stores fast, even if you felt fine during pregnancy. If you’re newly postpartum and your cold feeling comes with dizziness, shortness of breath, or heavy bleeding, get checked the same day.

Heavy periods

If you soak through pads or tampons quickly, pass large clots, or bleed longer than usual, low iron becomes more likely. Treatment may include iron plus care that reduces bleeding, so iron levels can stay up once they recover.

Older adults and people with stomach or bowel symptoms

In older adults, iron deficiency can be a clue to slow bleeding in the stomach or bowel. Ongoing belly pain, black stools, or unexplained weight loss needs prompt evaluation. People with reflux medicine use, bowel disease, or prior stomach surgery can also have trouble absorbing iron or vitamin B12.

Questions to bring to your appointment

These questions help you describe the problem clearly and steer the visit toward the right tests.

• When did the cold feeling start, and did it begin with fatigue or breathlessness?
• Any heavy periods, black stools, recent surgery, or recent childbirth?
• What does a normal week of meals look like, including meat, seafood, eggs, dairy, and fortified foods?
• Do you take acid reducers, metformin, or other long-term medicines?
• Any tingling, numbness, balance issues, or mouth soreness?

What improvement can feel like

Once treatment matches the cause, people often notice small changes first: a bit more energy, then less breathlessness, then less cold sensitivity. Iron stores can take months to rebuild even after hemoglobin rises.

If symptoms keep getting worse, follow up quickly. Ongoing blood loss, poor absorption, or a second issue like thyroid underactivity can keep you stuck.