Lab marker · High

High Hemoglobin: what it means

A Hemoglobin result above the normal range is considered high. Here is what a raised Hemoglobin can point to, and when it is worth discussing with a doctor.

Reference range: Men 13.5–17.5; Women 12.0–15.5 g/dL

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What a high Hemoglobin can mean

  • Dehydration — concentrates the blood.
  • Chronic hypoxia — smokers, COPD, sleep apnoea, high-altitude residence.
  • Polycythaemia vera — bone-marrow disorder; usually paired with high platelets and white cells.
  • Erythropoietin abuse / certain tumours — rare.

When to discuss with a doctor

Hb below 10 g/dL warrants a focused medical evaluation; <7 g/dL is the transfusion-consideration zone and needs urgent assessment. Hb >18 g/dL alongside symptoms (headache, dizziness, ruddy face) also warrants prompt workup. Mediora.AI flags critical Hb values directly inside your report.

Conditions this can relate to

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Mediora.AI is informational - interpretation, not a diagnosis. A single out-of-range value is common and often benign; always discuss decisions with your doctor.