Harvard Health Content API

A potassium result outside the expected range can raise questions about symptoms, heart health, and possible causes. Find out what details matter.

Starting birth control with a history of migraines can raise questions about which symptoms matter and what to discuss with your clinician.

I have trouble swallowing that is accompanied by chest pain. Tests show that I have a narrowing of the esophagus. What does this mean and what should I do?

I was recently diagnosed with Irritable Bowel Syndrome (IBS). I exercise to manage stress but don’t want to lose any more weight. How can I build a dietary plan?

Is there any evidence that the dietary supplement Osteo Bi-Flex helps keep arthritis in check?

My son is a healthy 9-year-old. He has gained at least 25 pounds in two months. I asked his doctor about this and she doesn’t seem to be too concerned about it. He weighs 93 pounds and his height is 4’8. Could there be a medical issue that I am overlooking?

Is mononucleosis contagious? My 19-year-old daughter has been diagnosed with mono. Should she stay away from her 86-year-old grandparents when they visit?

My son was diagnosed with strep throat last night and he still has a large egg size lymph node on the left side of his neck. Is that a normal symptom? How long should it take to go away?

Can a person overcome social anxiety naturally on his own?

I am a school nurse. One of our kindergarten students has ichthyosis. I would like to recommend some treatments to the parents. I am especially interested in how to decrease the odor problem. Are there specific products that address the odor?