High Hemoglobin Levels

High hemoglobin levels indicate that hemoglobin levels are above the normal range. Hemoglobin is a protein found in red blood cells responsible for carrying oxygen. The normal hemoglobin levels for adult males range from 13.8 to 17.2 grams/dL, and for females, it ranges from 12.1 to 15.1 grams/dL. When HGB levels exceed these ranges, HGB elevation occurs. This condition may indicate the body’s need for increased oxygen-carrying capacity, and identifying the underlying causes of this need is crucial.

High hemoglobin levels are associated with various health conditions. Additionally, individuals living at high altitudes may experience increased HGB levels because the oxygen concentration is lower in these environments, prompting the body to produce more hemoglobin to ensure adequate oxygen intake. Chronic lung diseases such as chronic obstructive pulmonary disease (COPD) and pulmonary fibrosis can also increase the body’s oxygen-carrying requirements, leading to elevated HGB levels.

Other causes of high hemoglobin levels include:


Inadequate fluid intake reduces blood plasma volume, which can increase hemoglobin concentration.


This condition is characterized by the excessive production of red blood cells, leading to increased hemoglobin levels.

Kidney Diseases:

Kidney tumors or other kidney diseases can cause the excessive production of erythropoietin, a hormone that stimulates red blood cell production.

Genetic Factors:

Some genetic conditions can cause increased hemoglobin production, leading to an enhanced oxygen-carrying capacity in the body.

High hemoglobin levels

What is HGB Elevation?

HGB levels are determined through a blood test known as a complete blood count (CBC). This test measures various types of cells and their ratios in the blood, including hemoglobin levels and the hematocrit ratio, which indicates the percentage of red blood cells in the total blood volume. A high hematocrit ratio is often associated with elevated hemoglobin levels.

Symptoms of High Hemoglobin Levels

The symptoms of elevated hemoglobin levels arise when the body produces excessive hemoglobin or when these levels exceed the normal range. These symptoms are related to the increased oxygen-carrying capacity and changes in blood viscosity (thickness and fluidity). Symptoms include:

  • Headaches: Increased blood viscosity can alter blood flow, leading to headaches.
  • Dizziness and Fainting: Insufficient oxygen reaching the brain can cause dizziness and fainting.
  • Vision Problems: Thickened blood and impaired circulation can result in vision issues.
  • Itching: Increased itching, especially after hot showers or baths, may be associated with conditions like polycythemia vera.
  • Redness and Skin Color Changes: Redness or changes in skin color may appear on the face, hands, and feet.
  • Fatigue: Higher hemoglobin levels and thicker blood can cause general fatigue and weakness.
  • Breathing Problems: Shortness of breath or rapid breathing may occur.
  • Chest Pain: Inadequate oxygenation or increased blood pressure can lead to chest pain.
  • High Blood Pressure: Increased blood viscosity and circulatory strain can result in high blood pressure.
  • Bleeding and Clotting Issues: High hemoglobin levels can make blood more prone to clotting, leading to clotting disorders and bleeding.

Causes of High Hemoglobin Levels

Hemoglobin elevation is associated with a condition called polycythemia. Polycythemia occurs when the body produces an excessive amount of red blood cells, increasing blood viscosity and causing various health issues. Polycythemia can be primary (polycythemia vera) or secondary (due to chronic hypoxia).

Monitoring and managing high hemoglobin levels is essential for accurate diagnosis and treatment. Regular checks and medical intervention, if necessary, play a critical role in maintaining overall health and preventing potential complications.

Normal Hemoglobin Levels and HGB Deficiency

Hemoglobin levels should be within a certain range for healthy living. The normal hemoglobin range for males is 13.8-17.2 grams/dL and for females, it is 12.1-15.1 grams/dL. Hemoglobin levels below these ranges indicate HGB deficiency, which is associated with conditions like anemia and results in inadequate oxygen transport in the body.

Causes of HGB deficiency include iron deficiency, vitamin B12 deficiency, chronic diseases, blood loss, and bone marrow disorders. Symptoms of HGB deficiency include fatigue, pale skin, shortness of breath, dizziness, chest pain, brittle nails, and hair loss. It is important to undergo necessary tests upon noticing these symptoms.