Known causes of anemia are bleeding, some hereditary diseases (thalassemia, porphyria, etc.), certain medications, and toxic substances. The symptoms of anemia depend on how low the hemoglobin level is. There may be pallor of the skin, lips and mucous membranes of the eyelids, dry skin, hair loss, brittle nails, blurred vision, headaches, dizziness, fainting, low blood pressure, heart palpitations, arrhythmias, shortness of breath, fatigue, fatigue, children lagging behind in physical development , memory impairment, decreased potency, deterioration in sperm quality, menstrual irregularities, etc.