Oct 13, 2023 · A heart arrhythmia (uh-RITH-me-uh) is an irregular heartbeat. A heart arrhythmia occurs when the electrical signals that tell the heart to beat don't work properly. The heart may beat too fast …

Sep 20, 2025 · If you or your child gets symptoms that might be from iron deficiency anemia, see your healthcare professional. Don't try to diagnose or treat it on your own. And talk to a healthcare …

Aug 8, 2018 · Overview Tourette (too-RET) syndrome is a disorder that involves repetitive movements or unwanted sounds (tics) that can't be easily controlled. For instance, you might repeatedly blink …

Mar 7, 2023 · Overview A muscle cramp is a sudden, unexpected tightening of one or more muscles. Sometimes called a charley horse, a muscle cramp can be very painful. Exercising or working hard, …

Oct 15, 2025 · Find out more about the different types, signs, symptoms and causes of brain tumors, which are growths of cells in the brain.

May 4, 2024 · Pancreatic cancer — Overview covers symptoms, risk factors, prevention, diagnosis, surgery, chemotherapy and other treatment for cancer of the pancreas.

Find possible causes of symptoms in children and adults. See our Symptom Checker.

Aug 17, 2022 · Unexplained weight loss has many causes — some serious. Find out when losing weight without trying calls for a medical evaluation.

Dec 30, 2023 · The development of a new pigmented or unusual-looking growth on the skin. Melanoma doesn't always begin as a mole. It also can happen on otherwise healthy skin. Melanomas symptoms …

May 22, 2025 · Overview Autism spectrum disorder is a condition related to brain development that affects how people see others and socialize with them. This causes problems in communication and …