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There are several causes of very thick or crumbling nails. They can be caused by injuries or pressure from shoes. Fungal infections are a common cause. Diabetes, psoriasis, or vascular disease are other possible causes.

This blood test is used to look for antibodies that your body makes to fight Rocky Mountain spotted fever, a serious bacterial infection caused by a tick bite.

Everyone has gas. It may be painful and embarrassing, but it is not dangerous. Learn what causes it, the symptoms, how it's diagnosed, and how it's treated.

Detailed information on the most common types of digestive disorders, including appendicitis, Barrett's esophagus, celiac disease, constipation, crohn's disease, diarrhea, diverticular disease, gas, gastritis, gastroesophageal reflux disease (GERD), gastr

Cold sores are small blisters around the mouth, caused by the herpes simplex virus. They are sometimes called fever blisters. The most common strain of the virus causing cold sores is herpes simplex virus 1. It can be spread by kissing or sharing eating utensils or even sharing towels.

Angina pectoris is chest pain or a feeling of chest discomfort that occurs when a part of your heart doesn't get enough blood and oxygen. Learn more about angina, including causes, risks, symptoms, diagnosis, treatment, and prevention.

Dry skin is a very common skin condition. It can make your skin feel irritated and itchy. Dry skin often worsens in the winter when the air is cold and dry. Bathing often also makes it worse. With no treatment, dry skin may become flaky or scaly.

Body dysmorphic disorder (BDD) is a mental health problem. If you have BDD, you may be so upset about how your body looks that it gets in the way of your ability to live normally.

This test is done to find out if you have abnormal proteins in your blood. They can be a sign of rheumatoid arthritis, lupus, or Raynaud's syndrome, among other illnesses.