OverviewAnemia is a condition in which you lack enough healthy red blood cells to carry adequate oxygen to your body's tissues. Having anemia, also referred to as low hemoglobin, can make you feel tired and weak. There are many forms of anemia, each with its own cause. Anemia can be temporary or long term and can range from mild to severe. In most cases, anemia has more than one cause. See your doctor if you suspect that you have anemia. It can be a warning sign of serious
illness. Treatments for anemia, which depend on the cause, range from taking supplements to having medical procedures. You might be able to prevent some types of anemia by eating a healthy, varied diet. Types- Aplastic anemia
-
Iron deficiency anemia
- Sickle cell anemia
- Thalassemia
-
Vitamin deficiency anemia
SymptomsAnemia signs and symptoms vary depending on the cause and severity of anemia. Depending on the causes of your anemia, you might have no symptoms. Signs and symptoms, if they do occur, might include: - Fatigue
- Weakness
- Pale or yellowish skin
- Irregular heartbeats
- Shortness of breath
- Dizziness or lightheadedness
- Chest pain
- Cold hands and feet
- Headaches
At first, anemia can be so mild that you don't notice it. But symptoms worsen as anemia worsens. When to see a doctorMake an appointment with your doctor if you feel fatigued and you don't know why. Fatigue has many causes besides anemia, so don't assume that if you're tired you must be anemic. Some people learn that their hemoglobin is
low, which indicates anemia, when they donate blood. If you're told that you can't donate because of low hemoglobin, make an appointment with your doctor. From Mayo Clinic to your inbox Sign up for free, and stay up to date on research advancements, health tips and current
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CausesAnemia can be due to a condition present at birth (congenital) or to a condition you develop (acquired). Anemia occurs when your blood doesn't have enough red blood cells. This can happen if: - Your body doesn't make enough red
blood cells
- Bleeding causes you to lose red blood cells more quickly than they can be replaced
- Your body destroys red blood cells
What red blood cells doYour body makes three types of blood cells — white blood cells to fight infection, platelets to help your blood clot, and red blood cells to carry oxygen from your lungs to the rest of your body and carbon dioxide from the body back to the lungs. Red blood cells contain hemoglobin — an iron-rich protein
that gives blood its red color. Hemoglobin enables red blood cells to carry oxygen from your lungs to all parts of your body and to carry carbon dioxide from other parts of the body to your lungs to be exhaled. Most blood cells, including red blood cells, are produced regularly in your bone marrow — a spongy material found within the cavities of many of your large bones. To produce hemoglobin and red blood cells, your body needs iron, vitamin B-12, folate and other nutrients from the foods
you eat. Causes of anemiaDifferent types of anemia have different causes. They include: Iron deficiency anemia. This most common type of anemia is caused by a shortage of iron in your body. Your bone marrow needs iron to make hemoglobin. Without adequate iron, your body can't produce enough hemoglobin for red blood cells. Without iron supplementation, this type of anemia occurs in many pregnant women. It's also caused by blood loss, such as
from heavy menstrual bleeding; an ulcer in the stomach or small bowel; cancer of the large bowel; and regular use of some pain relievers that are available without a prescription, especially aspirin, which can cause inflammation of the stomach lining resulting in blood loss. It's important to determine the source of iron deficiency to prevent recurrence of the anemia. - Vitamin deficiency anemia. Besides iron, your body needs folate and vitamin B-12 to produce enough
healthy red blood cells. A diet lacking in these and other key nutrients can cause decreased red blood cell production. Some people who consume enough B-12 aren't able to absorb the vitamin. This can lead to vitamin deficiency anemia, also known as pernicious anemia.
- Anemia of inflammation. Certain diseases — such as cancer, HIV/AIDS, rheumatoid arthritis, kidney
disease, Crohn's disease and other acute or chronic inflammatory diseases — can interfere with the production of red blood cells.
- Aplastic anemia. This rare, life-threatening anemia occurs when your body doesn't produce enough red blood cells. Causes of aplastic anemia include infections, certain medicines, autoimmune diseases and exposure to toxic chemicals.
- Anemias associated with bone marrow disease. A variety of diseases, such as leukemia and
myelofibrosis, can cause anemia by affecting blood production in your bone marrow. The effects of these types of cancer and cancer-like disorders vary from mild to life-threatening.
- Hemolytic anemias. This group of anemias develops when red blood cells are destroyed faster than bone marrow can replace them. Certain blood diseases increase red blood cell destruction. You can inherit a hemolytic anemia, or you can develop it later in life.
- Sickle cell
anemia. This inherited and sometimes serious condition is a hemolytic anemia. It's caused by a defective form of hemoglobin that forces red blood cells to assume an abnormal crescent (sickle) shape. These irregular blood cells die prematurely, resulting in a chronic shortage of red blood cells.
Risk factorsThese factors place you at increased risk of anemia: - A diet lacking in certain vitamins and minerals. A diet consistently low in iron,
vitamin B-12, folate and copper increases your risk of anemia.
- Intestinal disorders. Having an intestinal disorder that affects the absorption of nutrients in your small intestine — such as Crohn's disease and celiac disease — puts you at risk of anemia.
- Menstruation. In general, women who haven't had menopause have a greater risk of iron deficiency anemia than do men and postmenopausal women. Menstruation causes the loss of red blood cells.
- Pregnancy. Being pregnant and not taking a multivitamin with folic acid and iron, increases your risk of anemia.
Chronic conditions. If you have cancer, kidney failure or another chronic condition, you could be at risk of anemia of chronic disease. These conditions can lead to a shortage of red blood cells. Slow, chronic blood loss from an ulcer or other source within your body can deplete your body's store of iron, leading to iron
deficiency anemia. - Family history. If your family has a history of an inherited anemia, such as sickle cell anemia, you also might be at increased risk of the condition.
- Other factors. A history of certain infections, blood diseases and autoimmune disorders increases your risk of anemia. Alcoholism, exposure to toxic chemicals and the use of some medications can affect red blood cell production and lead to anemia.
- Age.
People over age 65 are at increased risk of anemia.
ComplicationsLeft untreated, anemia can cause many health problems, such as: - Extreme fatigue. Severe anemia can make you so tired that you can't complete everyday tasks.
- Pregnancy complications. Pregnant women with folate deficiency anemia can be more likely to have complications, such as premature birth.
- Heart problems. Anemia can lead to a rapid
or irregular heartbeat (arrhythmia). When you're anemic your heart pumps more blood to make up for the lack of oxygen in the blood. This can lead to an enlarged heart or heart failure.
- Death. Some inherited anemias, such as sickle cell anemia, can lead to life-threatening complications. Losing a lot of blood quickly results in acute, severe anemia and can be fatal. Among older people, anemia is associated with an increased risk of death.
PreventionMany
types of anemia can't be prevented. But you can avoid iron deficiency anemia and vitamin deficiency anemias by eating a diet that includes a variety of vitamins and minerals, including: - Iron. Iron-rich foods include beef and other meats, beans, lentils, iron-fortified cereals, dark green leafy vegetables and dried fruit.
- Folate. This nutrient, and its synthetic form folic acid, can be found in fruits and fruit juices, dark green leafy
vegetables, green peas, kidney beans, peanuts, and enriched grain products, such as bread, cereal, pasta and rice.
- Vitamin B-12. Foods rich in vitamin B-12 include meat, dairy products, and fortified cereal and soy products.
- Vitamin C. Foods rich in vitamin C include citrus fruits and juices, peppers, broccoli, tomatoes, melons and strawberries. These also help increase iron absorption.
If you're concerned about getting enough
vitamins and minerals from food, ask your doctor whether a multivitamin might help. Feb. 11, 2022
What is the most likely cause of anemia if it is microcytic and hypochromic?
Microcytic anemia is defined as the presence of small, often hypochromic, red blood cells in a peripheral blood smear and is usually characterized by a low MCV (less than 83 micron 3). Iron deficiency is the most common cause of microcytic anemia.
What are the common causes of a microcytic Anaemia?
Iron-deficiency anemia (IDA): This anemia is the most common cause of microcytic anemia. Thalassemias: These are blood disorders that affect your body's ability to make hemoglobin and red blood cells.
Which anemia is microcytic and hypochromic?
Hypochromic microcytic anemia with iron overload is a condition that impairs the normal transport of iron in cells. Iron is an essential component of hemoglobin , which is the substance that red blood cells use to carry oxygen to cells and tissues throughout the body.
What is the most significant problem associated with microcytic anemia?
Microcytic anemia is a condition in which the body's tissues and organs do not get enough oxygen. This lack of oxygen can happen because the body does not have enough red blood cells, or because the red blood cells do not contain enough hemoglobin, which is a protein that transports oxygen in the blood.
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