9. Irritable Bowel Syndrome
Symptoms of Irritable Bowel Syndrome (IBS) consist of abdominal pain, cramping, bloating, and diarrhea. The exact cause of this disorder is unknown, although it may be linked to abnormalities in the muscles or nerves of the intestinal tract. The Mayo Clinic also lists intestinal inflammation, severe infection, and abnormal gut flora as possible causes of IBS. This disorder can be difficult to diagnose due to the nonspecific symptoms of gastrointestinal distress. Additionally, there is no specific test used to positively diagnose patients with IBS.
8. Celiac Disease
Celiac disease is a condition that can sometimes mimic irritable bowel syndrome. According to the Celiac Disease Foundation, there are two steps to be taken in the diagnosis of celiac disease: screening and diagnosis. A doctor who suspects celiac disease may order a blood test called the tTg-IgA test. This test will pick up on antibodies in the blood that your immune system has formed against the gluten in wheat. If blood tests indicate that you have celiac disease, your physician will then order an intestinal biopsy. This involves using an endoscope to remove tissue from the small intestine in order to inspect the tissue for signs of celiac disease.
7. Sleep Apnea
Sleep apnea refers to periods in which a person stops breathing while sleeping. Obstructive sleep apnea refers to breathing that stops due to a blockage in the airway due to conditions like obesity, enlarged tonsils, or endocrine disorders. Central sleep apnea occurs when the brain is not properly signaling the body to breathe during sleep. Signs of sleep apnea include snoring, gasping for breath, or periods without breathing. These can result in extreme daytime drowsiness and fatigue, headaches, dry mouth, and difficulty concentrating. Daytime symptoms can be confused with depression, narcolepsy, or hypothyroidism. Your physician may use a sleep study to diagnose sleep apnea.Related: 7 Secret Sleep Apnea Symptoms