Healthy retirement
Learning Center
Cellulitis infection: Is it contagious?
Cellulitis — a common, potentially serious bacterial skin infection — is not directly contagious.
COVID-19 and pets: Can dogs and cats get COVID-19?
Find out how COVID-19 can affect dogs and cats, what you can do to protect your pet, and how to care for your pet if it becomes sick.
Bump on the head: When is it a serious head injury?
Even a minor injury to the scalp or forehead can cause a large lump. Find out when it's time to see a healthcare professional.
Bulging disk vs. herniated disk: What's the difference?
Compared with a bulging disk, a herniated disk is more likely to cause pain because it protrudes farther and is more likely to compress nerve roots.
Broken arm
Treatment depends on the site and severity of the injury. Simple breaks might be treated with a sling and ice. Complicated fractures may require surgery.
Blood pressure: Is it affected by cold weather?
Blood pressure generally is higher in the winter than in the summer. Discover why.
Blood in semen
This symptom can be scary, but the cause is most often not cancer. Find out possible causes and when to see a doctor.
Bladder outlet obstruction: Causes in men?
Find out more about the causes of male bladder outlet obstruction and possible next steps.
Bladder infection in men
Although women are more likely to get bladder infections, men can get them, too. Learn about signs and symptoms and what could put you at risk.
Birthmarks
Learn to identify types of birthmarks by how the skin looks. Examples include café au lait spot, congenital nevus, port-wine stain and hemangioma.
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