Excess hemoglobin in the body-also known as polycythemia or erythrocytosis-can lead to various symptoms due to thickened blood and reduced blood flowHere are 5 signs of excess hemoglobinHeadaches: Thick blood can reduce oxygen flow to the brain, causing frequent or intense headachesDizziness or Vertigo: Poor circulation from increased red cell mass can cause lightheadedness or a spinning sensationRed or Flushed Skin (especially face): The skin, especially on the face, may appear reddish due to increased blood volumeHigh Blood Pressure: Thicker blood can increase vascular resistance, leading to elevated blood pressureFatigue or Weakness: Despite the high hemoglobin, oxygen delivery may be impaired, paradoxically causing tiredness