An anal abscess is a collection of pus around the rectal or anal region. WebMD explains what an anal abscess is, what causes it, how to treat it, and more.

Imperforate anus, or anorectal malformation, occurs when the anal opening and rectum do not develop correctly. It is a congenital problem, a defect that occurs before a baby is born, and it ...

Scientists have discovered exactly how the human anus may have evolved around 550 million years ago. They believe a hole originally used to release sperm later connected to the gut to form the ...

A woman who suffers from Crohn's disease and had to have her butt removed has shared the gruesome details of what it's really like to 'not have an anus anymore.' Maggie Tretton, 29, from ...

A scientist has stumbled upon a creature with a “transient anus” that appears only when it is needed, before vanishing completely. The warty comb jelly, or sea walnut, looks a lot like a ...

It’s not always possible to prevent an itchy anus at night, especially if it’s from a chronic health issue. But there are some things you can do to reduce the risk of rear-end itching.

It had no anus, but was covered in pores that its discoverers believe to be a precursor to gill slits. “However, not everyone is convinced by this interpretation,” says Rahman.

Scientists took a look at the distance from the anus to the scrotum of 126 men and tested how it related to fertility. Don't ask why they did this or why someone gave them a pile of money to ...