This condition occurs due to a decrease in the ability of the blood to carry oxygen because of a reduction in the number of red blood cells and /or the amount of haemoglobin that they contain.

A person suffering from anaemia will have pale skin and there is an absence of colour inside the lower eyelid. He or she often feels tired and generally weak. Since the changes are gradual, the person may not be aware of the cause till the condition becomes quite severe. Causes include bleeding due to injury, menstruation, internal bleeding, piles, iron deficiency in the diet or mal-absorption of iron in the intestine because of disease. Proper food intake and deep breathing exercise help a lot to improve the condition.