Lupus is an autoimmune disorder in which a person’s immune system attacks their own healthy tissues and organs. Common signs of lupus can be nonspecific and difficult to distinguish from those of other medical conditions. They may include fatigue, headaches, swollen joints, and sensitivity to the sun. While lupus is sometimes accompanied by a rash across the cheeks and nose, this butterfly-shaped rash does not always occur. Since there is no definitive test for lupus, diagnosis can be difficult. A physician may run blood tests to check your immune system function or to look for signs of inflammation.
5. Lyme Disease
Lyme disease is a disease spread through the bites of infected ticks. Symptoms of Lyme disease include fever, fatigue, chills, headache, and muscle or joint pain. In many cases, symptoms are accompanied by a rash three to 30 days after the bite. Early symptoms of Lyme disease may be confused with influenza. As the disease progresses, it may be inaccurately diagnosed as conditions like multiple sclerosis, rheumatoid arthritis, or chronic fatigue syndrome. Blood tests can help aid in the diagnosis of Lyme disease.
4. Multiple Sclerosis
Multiple sclerosis (MS) is a disorder in which the body’s immune system attacks the central nervous system (CNS), including the brain and spinal cord. Symptoms may include fatigue, numbness, difficulty walking, and involuntary muscle spasms. Sudden visual problems can also be a distressing symptom of MS. This condition can be tricky to diagnose, as it may mimic other autoimmune disorders, infections of the CNS, or vitamin deficiencies. The National Multiple Sclerosis Society states that in order to diagnose MS, a physician’s findings must meet three criteria. There must be damage in at least two areas of the CNS, the damage must have occurred at separate times, and all other possible diagnoses must be ruled out.Related: 10 Signs of Lupus You Shouldn’t Ignore