Lightheadedness is a type of dizziness that occurs when blood supply and oxygen to the brain are restricted. A decrease in oxygen could also prevent proper body functioning and it may cause pain, too. Headaches and lightheadedness are common symptoms that do not usually indicate a serious illness, however.
Hypoglycemia
The sugar glucose is the main source of fuel for the body, providing the energy needed to carry out physiological and physical functions. Glucose is absorbed in the bloodstream after the consumption of carbohydrates. Hypoglycemia, which is also referred to as low blood sugar or low blood glucose, is a condition that occurs when levels of glucose in the blood drop below normal.
When glucose levels are low, it can cause lightheadedness, headaches, hunger, shakiness, increased sweating, nervousness, confusion, weakness and anxiety. Hypoglycemia is commonly associated with diabetes, but mild cases of hypoglycemia can occur as a result of extended periods of time without food. Hypoglycemia can be treated with the consumption of quick-acting carbohydrates, such as glucose tablets, fruit juice or milk.
Iron-Deficiency Anemia
Anemia is a condition in which there are not enough healthy red blood cells in the body to supply adequate oxygen to the tissues. There are several types of anemia. Most develop as a result of vitamin or mineral deficiencies.
Iron-deficiency anemia, which is caused by a lack of iron, is the most common form of anemia and affects approximately 20% of women, according to MedlinePlus. A lack of iron can occur as a result of prolonged or intense bleeding, lack of iron in the diet or inability of the body to absorb iron.
Besides lightheadedness and headaches, symptoms of iron-deficiency anemia include fatigue, weakness, brittle nails, shortness of breath, irritability and decreased appetite. Most cases of iron deficiency anemia can be corrected with iron supplementation. MedlinePlus notes that in cases where oral supplementation is not tolerated well, intravenous iron may be needed.
Heat Exhaustion
Heat exhaustion is a condition that occurs when internal body temperature increases but the body is unable to effectively cool itself off. This can be caused by a combination of extremely hot outdoor temperatures and strenuous exercise. In addition to lightheadedness and headaches, symptoms of heat exhaustion include cool skin and chills even while exposed to heat; increased and severe sweating; fatigue; weak pulse; low blood pressure; and muscle cramps.
Most cases of heat exhaustion can be treated by increasing fluid intake, resting in a cool place and applying cool water to the skin, according to MayoClinic.com. In severe cases, intravenous fluids may be needed.
