Your blood helps you move. It carries air to your body. Sometimes, the blood has less air. This can make you feel tired. It might make you feel weak.
Do you feel strong today?
Your blood carries air to your body. Sometimes, the blood has less air. This can happen if you have fewer red cells.
This can make you feel very tired. You might feel weak or dizzy. Some people have a hard time breathing.
Low iron is a common cause. Not having enough vitamins can also cause it. This can happen to many people.
Doctors can help you feel better. They may suggest special food or pills. Some people even need more blood.
It is good to stay healthy.
Your blood carries oxygen to your body. This is very important. Anemia is a blood disorder. It happens when your blood cannot carry enough oxygen.
This can happen for a few reasons. You might have too few red blood cells. You might also have low hemoglobin. Hemoglobin is a part of the cell that carries oxygen.
There are many ways to get anemia. Some people lose blood from an injury. Others do not make enough red cells. This can happen if you lack iron. Iron deficiency is the most common cause in the world.
Anemia can also come from cells breaking down too fast. This can happen from infections like malaria. Some people are born with it. This is called a genetic disorder.
How do you feel with anemia? It can come on slowly. You might feel tired or weak. You may have a headache. It can also make you short of breath.
If it happens fast, it is called acute anemia. This can make you feel confused. You might even pass out. Doctors can help by using iron pills or blood transfusions.
Anemia is a common blood disorder that affects how your body uses oxygen. Your red blood cells act like tiny delivery trucks. They carry oxygen to every part of your body so you have energy. Anemia happens when these trucks are not working well. You might have too few red blood cells in your blood. You might also have too little hemoglobin, which is the part of the cell that holds the oxygen.
Without enough oxygen, your body cannot run as well as it should.
There are a few different ways this happens in the body. Sometimes, the body simply does not make enough new red blood cells. This can happen if you do not have enough iron, folate, or vitamin B12. Other times, the body loses blood through injury or surgery. It can also happen if red blood cells break down too fast. This is called hemolytic anemia.
Infections like malaria can cause these cells to break down quickly.
How you feel depends on how fast the anemia develops. If it happens slowly, you might only feel a little tired. You might have headaches or feel weak when you exercise. You may even notice your skin looks pale or yellowish.
If it happens very fast, it is called acute anemia. This can make you feel confused or dizzy. In serious cases, a person might even pass out.
Scientists and doctors use specific numbers to find anemia. In men, a hemoglobin level below 130 g/L means anemia. For women who are not pregnant, the number is below 120 g/L. Pregnant women need even more oxygen, so their level is lower.
Doctors can also look at the size of the cells. Small cells are called microcytic, while large cells are called macrocytic. These details help doctors find the right way to help.
Anemia is a huge global health topic. It affects about one-fifth to one-third of all people in the world. Iron deficiency is the most common cause and affects nearly one billion people.
This condition is most common in children and pregnant women. Because it is so common, the World Health Organization has set goals to help reduce it by 2025. Helping people get enough iron and vitamins is a big part of this plan.
Anemia is a widespread blood disorder that reduces the body's ability to transport oxygen. Oxygen is essential for providing energy to all living tissues. This reduction in oxygen capacity occurs through three main pathways. A person may have a low number of red blood cells. They may have a low amount of hemoglobin, which is the protein that carries oxygen. Or, the hemoglobin itself may have abnormalities that prevent it from working correctly.
To understand how this works, we must look at how the body maintains its blood supply. This process is called erythropoiesis. In healthy adults, stem cells in the red bone marrow mature into red blood cells over about seven days. The body is incredibly busy, producing between 2 and 3 million new red blood cells every single second. These cells live for about 100 to 120 days as they circulate through the body. Eventually, the cells age and change. This makes them easy for the spleen to recognize so they can be broken down. This breakdown process is called eryptosis. In a healthy system, the rate of production matches the rate of breakdown to keep the population balanced.
Anemia is categorized by the physical characteristics of the red blood cells. Doctors look at the size of the cells and the amount of hemoglobin they contain. If the cells are smaller than normal, the condition is called microcytic anemia. If the cells are larger than normal, it is called macrocytic anemia. When the cells are of a normal size, it is referred to as normocytic anemia.
These classifications help medical professionals determine the underlying cause of the disorder.
There are several distinct ways that anemia can develop. One cause is decreased production, where the bone marrow cannot make enough cells. This can happen due to iron deficiency or a lack of folate and vitamin B12. It can also be caused by bone marrow tumors or kidney failure, which reduces the hormone erythropoietin. Another cause is increased breakdown, known as hemolytic anemia. This occurs when red blood cells are destroyed faster than they are made, often due to infections like malaria or genetic disorders like sickle cell anemia.
Finally, anemia can be caused by blood loss from surgery, injury, or menstruation.
Symptoms vary depending on how quickly the anemia develops. If anemia is chronic, meaning it comes on slowly, the body may adapt. Symptoms might be vague, such as tiredness, weakness, or headaches. A person might also notice pale or yellowish skin, or even spoon-shaped nails in cases of iron deficiency.
If the anemia is acute, meaning it happens very fast, the symptoms are much more severe. This can include confusion, rapid heartbeat, low blood pressure, and even loss of consciousness. In severe cases, the heart may work much harder to compensate, leading to a fast heart rate or chest pain.
Anemia is a massive global health issue, affecting between one-fifth and one-third of the world's population. Iron-deficiency anemia is the most frequent cause and impacts nearly one billion people.
This condition is most prevalent in children, the elderly, and women of reproductive age. For example, the prevalence in women aged 15 to 49 rose from 27.6% to 30.7% between 2012 and 2023. In 2013, iron-deficiency anemia caused approximately 183,000 deaths. This was a decrease from 213,000 deaths recorded in 1990.
Because of its impact, anemia is a major focus for international health organizations. It is one of the six World Health Organization global nutrition targets for 2025. Addressing anemia is also linked to the Sustainable Development Goals, specifically SDG 2, which aims to achieve zero world hunger. Medical treatments are highly specific to the cause. While some groups, like pregnant women, may use iron pills for prevention, doctors do not recommend general dietary supplements without a diagnosis. In very severe cases, doctors may use blood transfusions to restore oxygen levels.
Where will your curiosity go next?
🖼️ Images & Media (7)
More to explore
✨ What else?
Related topics you might enjoy
🔬 Go deeper
More advanced topics to explore
🪜 Step back
Simpler topics to build understanding
What is Nepedia?
A free, ad-free encyclopedia for children. Every article is written at five reading levels, so the same page works for a five-year-old and a fifteen-year-old — use the level switcher above to see this one change. No account needed to read.