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Anemia is a symptom caused by a myriad of conditions. These conditions include iron deficiency, vitamin B12 deficiency, vitamin C deficiency, Vitamin E deficiency, vitamin B6 deficiency, and thyroid disorders. * Iron deficiency anaemia : The most common form of anaemia which is usually due to nutricial deficiency of iron or chronic blood loss caused by excessive menstruation or accident.* Pernicious anaemia : a condition in which the body can't make enough healthy red blood cells because it doesn't have enough vitamin B12. People who have pernicious anaemia can't absorb enough vitamin B12 due to a lack of intrinsic factor (a protein made in the stomach). Without enough vitamin B-12, the body will produce abnormally large red blood cells called macrocytes. Because of their large size, these abnormal cells may not be able to leave the bone marrow, where red blood cells are made, and enter the bloodstream. This decreases the amount of oxygen-carrying red blood cells in the bloodstream and can lead to fatigue and weakness.* Thalassaemia : an inherited blood disorder which cause the body to make fewer healthy red blood cells and less haemoglobin (an iron-rich protein in red blood cells).* Aplastic anaemia : a blood disorder in which the body's bone marrow doesn't make enough new blood cells. This may result in a number of health problems including arrhythmias, an enlarged heart, heart failure, infections and bleeding.* Haemolytic anaemia : Haemolytic anaemia is a condition in which red blood cells are destroyed and removed from the bloodstream before their normal lifespan is up. A number of diseases, conditions and factors can cause the body to destroy its red blood cells. Haemolytic anaemia can lead to various health problems such as fatigue, pain, arrhythmias, an enlarged heart and heart failure.* Sickle cell anaemia : a serious disease in which the body makes sickle-shaped ("C"-shaped) red blood cells. Normal red blood cells are disk-shaped and move easily through your blood vessels. Red blood cells contain the protein haemoglobin (an iron-rich protein that gives blood its red colour and carries oxygen from the lungs to the rest of the body). Sickle cells contain abnormal haemoglobin that causes the cells to have a sickle shape, which don’t move easily through the blood vessels – they are stiff and sticky and tend to form clumps and get stuck in the blood vessels.* Fanconi anaemia : Fanconi anaemia, or FA, is a rare, inherited blood disorder that leads to bone marrow failure. FA is a type of aplastic anaemia that prevents your bone marrow from making enough new blood cells for your body to work normally. FA can also cause your bone marrow to make many abnormal blood cells. This can lead to serious health problems, such as leukemia.