A high total red blood cell (RBC) count—erythrocytosis—can result from dehydration, smoking, high altitude, lung or heart disease, or a bone marrow disorder (polycythemia vera). It may cause headache, dizziness, visual disturbance, itching and ruddy skin. Elevated RBCs thicken blood, increasing risk of clots, stroke and heart attack. Doctors evaluate causes with tests and treat by addressing underlying conditions, phlebotomy or medication.

RBC total is the red blood cell count from a complete blood count, measuring how many erythrocytes are in a microliter of blood. It reflects oxygen‑carrying capacity; low values suggest anemia, bleeding, or bone‑marrow problems, while high values may indicate dehydration or polycythemia. Normal adult ranges vary by sex but are roughly 4–6 million cells/µL; exact ranges depend on the lab.

Low total RBC count reduces blood’s oxygen-carrying capacity, causing fatigue, weakness, breathlessness, rapid heartbeat, dizziness, pale skin, headaches, and cold extremities. It can impair concentration and exercise tolerance; severe or prolonged anemia may strain the heart, increasing risk of chest pain or heart failure. Causes include blood loss, nutritional deficiencies, chronic disease, or bone marrow disorders; prompt medical evaluation identifies cause and guides treatment.

Total RBC in blood is the red blood cell count — the number of erythrocytes per microliter (µL) of blood. It typically falls around 4.5–6.0 million/µL in men and 4.0–5.5 million/µL in women. RBCs transport oxygen via hemoglobin; low counts indicate anemia, while high counts can reflect dehydration, lung disease, or bone marrow disorders.

Treatment depends on the cause. For polycythemia vera doctors use regular phlebotomy to lower hematocrit, low‑dose aspirin and cytoreductive drugs (hydroxyurea or interferon) plus risk‑factor control. For secondary erythrocytosis they treat the underlying problem (oxygen or CPAP for hypoxia, stop smoking, remove EPO‑producing tumors); phlebotomy or temporary measures may reduce thrombotic risk.

Choose a low‑iron, balanced diet: limit red meat, liver, iron‑fortified cereals and supplements. Favor dairy and calcium‑rich foods, whole grains and legumes (phytates reduce iron absorption), and drink plenty of water. Eat antioxidant-rich fruits and vegetables but avoid taking vitamin C with iron-containing meals. Avoid alcohol and smoking, and follow your clinician’s advice for personalized care.