Anemia

I THINK I have this blood disorder. I think it runs in the family, since my mom and my eldest sister seem to have it. No wonder I'm so weak.

Anemia is the most common disorder of the blood. The three main classes of anemia include excessive blood loss, excessive blood cell destruction or dificient red blood cell production.

Anemia goes undetected in many people, and symptoms can be minor or vague. The signs and symptoms can be related to the anemia itself, or the underlying cause.
Most commonly, people with anemia report non-specific symptoms of a feeling of weakness, or fatigue, general malaise and sometimes poor concentration.
They may also report shortness of breath, dyspnea, on exertion. In very severe anemia, the body may compensate for the lack of oxygen carrying capability of the blood by increasing cardiac output.
The patient may have symptoms related to this, such as palpitations, angina (if preexisting heart disease is present), intermittent claudication of the legs, and symptoms of heart failure.

Got this information from Wikipedia.org .