Anemia is a condition in which a person doesn’t have enough red blood cells to carry oxygen throughout the body. As a result, they may experience dizziness, fatigue, and light-headedness.
Hyperglycemia (also known as high blood sugar) is a condition in which a person's blood glucose level is higher than normal.
When inflammation in the sinuses leads to a sinus infection (or sinusitis), you can feel drained and miserable. Sinusitis become chronic, but help is available.
Sickle cell disease is a group of inherited red blood cell disorders in which hemoglobin, a protein that carries oxygen, is abnormal.
Dyspnea is a medical term that describes shortness of breath, and a feeling of starving for oxygen. Learn about symptoms and treatment.
A hemoglobin A1C test is a blood test that measures a person's average blood glucose level over the previous three months.
Dizziness is a term to describe a range of sensations, such as feeling faint, weak, or unsteady. Learn about symptoms and treatment.
Fatigue is a common side effect of treatment for cancer. Learn more about symptoms and treatment.