Some illnesses that have the symptoms of fatigue, weakness, headache and nausea are diabetes Type 1, diabetes Type 2, anemia and glaucoma, states WebMD. There are over 150 different medical conditions that share these common symptoms.
Type 1 diabetes is usually found in children and young adults and is characterized by the body not producing enough insulin, says the American Diabetes Association. The help of insulin therapy usually ensures that individuals suffering from this condition live healthy lives. Type 2 diabetes is the most common form of diabetes and is characterized by high blood sugar levels. Eating a healthier diet and exercising more frequently usually helps combat the condition.
Anemia is a condition in which an individual's red blood cells are less than normal. Anemia is the most common blood condition in the United States, notes WebMD. People suffering from this condition constantly feel fatigued and lack energy. Glaucoma is a condition that causes damage to an individual's eye because of fluid build-up. People suffering from this condition are usually nauseous and experience headaches. Symptoms of fatigue, weakness, headache, and nausea are fairly common and don't necessarily have to be serious or life threatening, according to MedlinePlus. Individuals suffering from these symptoms can be in need of exercise, sleep, good nutrition and a stress-free lifestyle.