Fitness basics
Learning Center
Abdominal pain
Everyone experiences abdominal pain from time to time. Find out when it might be cause for concern.
Anal pain
Anal pain: Symptom — Overview covers definition, possible causes of this common symptom.
Bent penis
Learn what can cause a curved erection and when you may need to see a health care provider.
Bleeding during pregnancy
Learn what may cause vaginal bleeding during pregnancy and when you should see a doctor about it.
Blood in semen
Finding blood in your semen can be alarming, but the cause is usually benign. Find out possible causes and when to see a doctor.
Breast calcifications
Most breast calcifications are benign. Find out more about what can cause them, what they look like, and when to see a doctor.
Breast lumps
A breast lump could be due to something harmless. Or it could be cancer. Learn breast lump causes and find out when you need to see a health care provider.
Breast rash
Overview covers the definition and possible causes of breast rashes.
Diarrhea
Diarrhea: Symptom — Overview covers definition, causes of acute and chronic diarrhea.
Dry orgasm
It's possible for men to reach sexual climax without ejaculating. Learn about the possible causes.