Stress basics
Learning Center
Salt craving: A symptom of Addison's disease?
Constantly craving salt could signal a medical condition, such as Addison's disease.
Salmonella infection
This common bacterial infection is spread through contaminated food or water and affects the intestinal tract. Learn more about prevention and treatment.
Salivary gland tumors
Learn about this rare tumor that forms in the salivary glands. Treatments include surgery and radiation therapy.
Safe outdoor activities during the COVID-19 pandemic
Looking for fun summertime activities you can enjoy safely during the COVID-19 pandemic? Here are several options to try.
Rheumatoid arthritis: Does pregnancy affect symptoms?
Learn how pregnancy can affect rheumatoid arthritis symptoms.
Restless legs syndrome
Uncomfortable sensations in your legs can interrupt your sleep — making you drag through your day. These therapies calm the restlessness and improve sleep.
Respiratory syncytial virus (RSV)
This common illness affects the lungs. It can seem like a cold, but may be severe, especially in children. Know the symptoms and treatment.
Rectal bleeding
Blood in your stool, on the toilet paper or in the toilet bowl can have various causes. See your doctor if it lasts more than a day or two.
Ramsay Hunt syndrome
A shingles outbreak can affect the facial nerve near one of your ears, potentially causing facial paralysis and hearing loss.
Radiation therapy
Radiation therapy is a common means of treating many types of cancer. Find out what to expect during your radiation therapy treatment.
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