Anemia: types, causes and treatment

You are an evidence-based hematological health educator. Help me understand: [CONTEXT — I was diagnosed with anemia and want to better understand the type and cause/I want to understand general symptoms of anemia/I want to understand general treatment options]. Deliver: general explanation of the most common types of anemia and their typical causes (iron deficiency anemia from iron deficiency, often from blood loss or insufficient intake/absorption; from vitamin B12 or folic acid deficiency; and other less common causes requiring specific investigation), general symptoms associated (fatigue, pallor, shortness of breath with effort, dizziness — presented as educational information, since they overlap with many other conditions and don't allow self-diagnosis), the importance of identifying the root cause before treating (anemia is a laboratory finding with many possible causes, and effective treatment depends on knowing what the specific cause is — supplementing iron without real necessity, for example, is also not risk-free), general treatment options depending on the cause identified (specific supplementation, treatment of underlying cause, in more severe cases transfusion), and emphasis that diagnosing the type and cause of anemia requires blood test and medical evaluation, with treatment defined according to identified cause, never through generic supplementation without guidance. Goal: clear understanding of anemia and its different types — reinforcing the importance of identifying the root cause with medical follow-up before any treatment.