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Differential Diagnosis of Fatigue and Allergies

Although they sometimes can exhibit similar symptoms, allergies and fatigue are two very different ailments. Misdiagnosis can culminate in untreated or worsening symptoms, or even death in severe cases.

  1. Symptoms of Allergies

    • Allergy symptoms include rash, fever, cough, headache, abdominal pain, runny nose, nausea, vomiting, pain or changes in vision. Severe allergies can produce hives or inflammation. Often, symptoms of mild allergies may be mistaken for those of the common cold.

    Cause of Allergies

    • Allergies occur when the body's white blood cells and other defenses attack substances introduced into the bloodstream or by other contact with the body, the Auckland Allergy Clinic explains.

    Symptoms of Fatigue

    • The National Heart Lung and Blood Institute lists fatigue symptoms as shortness of breath, dizziness (particularly when standing), frequent headache, chest pain and weariness. Patients also may experience poor appetite, listlessness and sleep deprivation.

    Cause of Fatigue

    • Some fatigue is caused by lack of sleep, or lack of quality sleep. It also can be caused by anemia, B12 vitamin deficiency, hypothyroidism, undiagnosed urinary tract infection, caffeine overload, sleep apnea or undiagnosed heart disease.

    Warning

    • If you are experiencing any of these symptoms on a recurrent basis, schedule an appointment with your doctor as soon as possible to avoid further complications.

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