Intra-rectal pressure builds as the rectum fills with feces, pushing the feces against the walls of the anal canal. Contractions of abdominal and pelvic floor muscles can create intra-abdominal pressure which further increases intra-rectal pressure. The internal anal sphincter (an involuntary muscle) responds to the pressure by relaxing, thus allowing the feces to enter the canal. The rectum shortens as feces are pushed into the anal canal and peristaltic waves push the feces out of the rectum. Relaxation of the internal and external anal sphincters allows the feces to exit from the anus, finally, as the levator ani muscles pull the anus up over the exiting feces.

Some infections can cause problems during pregnancy, such as Giardia (giardiasis) and Group B Streptococcus (GBS), among others. Giardia can cause chronic diarrhea which may lead to dehydration and malnutrition, both of which can be dangerous during pregnancy both for the mother and fetus. GBS may be transmitted to the baby during delivery and can lead to an infection in the infant. Both Giardia and GBS often colonize the rectum and can be spread to the vaginal tract if vaginal or oral sex follows anal sex, or if there is any touching (hands or genitals) after anal sex.
A tiny mite nicknamed the “human itch mite” causes this rash. The bugs burrow into the top layers of your skin to feed. People usually get scabies from skin-to-skin contact. It spreads quickly where people spend a lot of time close together, like in day-care centers, dormitories, and nursing homes. Sharing clothes, towels, and bedding can spread it, too. Like pinworms, your doctor may suggest treating the family if one member has it.
The information on this site is not intended or implied to be a substitute for professional medical advice, diagnosis or treatment. All content, including text, graphics, images, and information, contained on or available through this website is for general information purposes only. The purpose of this is to help with education and create better conversations between patients and their healthcare providers.

Let’s walk through what actually happens inside your body when you poop. Food starts in your stomach, where it gets broken down. Then, it passes through your small intestine, where it gets digested even more. The remaining food waste, aka poop, gets stored in your large intestine, which is a long tube also known as the colon, according to the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK).
Silicone Based Lube – Silicone based lube is the lube we recommend you use when having anal sex. It’s compatible with latex condoms, so you won’t degrade them. It also lasts much longer than water-based lube, so you don’t have to worry about reapplying it either. It also feels super silky and smoother than many water-based lubricants. The only slight drawback is that it can sometimes be a little hard to wash out of your bedclothes.
PDQ is a registered trademark. The content of PDQ documents can be used freely as text. It cannot be identified as an NCI PDQ cancer information summary unless the whole summary is shown and it is updated regularly. However, a user would be allowed to write a sentence such as “NCI’s PDQ cancer information summary about breast cancer prevention states the risks in the following way: [include excerpt from the summary].”
Most anal cancers are cured with combination therapy. If caught early, many cancers that come back after nonsurgical treatment are treated effectively with surgery. While combination radiation/chemotherapy produces more side effects, this approach also results in the best long-term survival rates. After completing this treatment, as many as 70-90% of patients are still alive and cancer free at 5 years.
The human papillomavirus (HPV)  is a sexually transmitted disease that causes anal warts. They grow inside and around your anus and may spread to your genitals. Itching is a common symptom. If you think you have anal warts, see your doctor. Without treatment, they can grow large and more may show up. Untreated warts can make you more likely to get anal cancer, too.

CT scan (CAT scan): A procedure that makes a series of detailed pictures of areas inside the body, such as the abdomen or chest, taken from different angles. The pictures are made by a computer linked to an x-ray machine. A dye may be injected into a vein or swallowed to help the organs or tissues show up more clearly. This procedure is also called computed tomography, computerized tomography, or computerized axial tomography. For anal cancer, a CT scan of the pelvis and abdomen may be done.
Maybe you're super excited to try anal and you want to get right in there — don't. It's always best to start slowly with a new sexual experience, but is especially important when you're trying anal sex because the sphincter muscles in an anus are tightly closed. So, instead of jumping in with a penis or sex toy, have your partner stick one (lubed up!) finger inside your rectum first. Then, slowly add more fingers until you're ready to move on to penetration with a penis or with a strap-on.
Anal sex videos introduce porn lovers to a journey into the netherworld. Often involving the insertion of a dick into an asshole, anal intercourse can also imply fingering or the use of sex toys. Anal penetration can even involve multiple cocks at once. Anal sometimes ends with an internal cumshot, known as a creampie, which can be a sweet surprise!
Yep — pregnancy. In order for someone to become pregnant, sperm needs to make it into the vagina (and then through the cervix and into the uterus, etc.), and that could be possible (though unlikely) depending on what position you’re in, she explains. So ejaculating in someone’s butt probably isn’t the best idea if you're not also using another form of birth control.
Historically, anal sex has been commonly associated with male homosexuality. However, many gay men and men who have sex with men in general (those who identify as gay, bisexual, heterosexual or have not identified their sexual identity) do not engage in anal sex.[8][9][53][54] Among men who have anal sex with other men, the insertive partner may be referred to as the top and the one being penetrated may be referred to as the bottom. Those who enjoy either role may be referred to as versatile.[55][56]
Latex or polyurethane male condoms are highly effective in preventing HIV and certain other STDs when used correctly from start to finish for each act of anal sex. People who report using condoms consistently reduced their risk of getting HIV through insertive anal sex with an HIV-positive partner, on average, by 63%, and receptive anal sex with an HIV-positive partner, on average, by 72%. Condoms are much less effective when not used consistently. It is also important that sufficient water- or silicone-based lubricant be used during anal sex to prevent condom breakage and tearing of tissue. Female nitrile condoms can also prevent HIV and some other STDs. Since condoms are not 100% effective, consider using other prevention methods to further reduce your risk.
A clinical trial is a study to answer a scientific question, such as whether one treatment is better than another. Trials are based on past studies and what has been learned in the laboratory. Each trial answers certain scientific questions in order to find new and better ways to help cancer patients. During treatment clinical trials, information is collected about the effects of a new treatment and how well it works. If a clinical trial shows that a new treatment is better than one currently being used, the new treatment may become "standard." Patients may want to think about taking part in a clinical trial. Some clinical trials are open only to patients who have not started treatment.

The only way to overcome this is to have anal sex regularly. This way your sphincter will get used to being full and relaxing around your man. If you don’t get a chance for regular anal sex, then my advice is to try using a dildo with a flared base (so that it doesn’t get sucked inside you) or use a butt plug when masturbating to train yourself anally.

With anal sex, the anus can play a role in sexuality. Attitudes towards anal sex vary and it is illegal in some countries.[3] The anus is often considered a taboo part of the body,[3] and it is known by a large number of usually vulgar slang terms. The anus is also the site of potential infections and other conditions, including cancer.[citation needed] The traditional polite synonym for anus was fundament, though this euphemism is rarely heard now that medical terms are widely acceptable.
The anal canal is a short tube surrounded by muscle at the end of your rectum. The rectum is the bottom section of your colon (large intestine). When you have a bowel movement, stool leaves your body from the rectum through the anal canal. Cancer begins when some of the body’s cells divide without stopping. As the cancer grows, it may stay in nearby tissues or spread to other parts of the body, a process called metastasis. Anal cancer starts in the cells around or just inside the anal opening. A person may be diagnosed with precancerous cells in the anal area. With time, these cells may have a high chance of becoming cancerous. While this condition is treated differently than anal cancer, it is the reason to get treatment early.
Oil Based Lube – Oil based lube feels a little smoother and silkier than water-based lube. It also lasts for ages, so it’s perfect for anal sex, but there are some significant drawbacks. It’s much harder to wash out of linens. More importantly, oil-based lube degrades latex condoms making them tear and rip. Bottom line, if you don’t want the condom to tear during the act, then don’t use an oil-based lube.
Using protection during anal sex is important to reduce your risk of catching an STI. For penetrative sex, make sure you use a condom and lots of lube – some people feel safer using extra-thick condoms for anal sex. Dental dams also offer good protection for rimming. Taking pre-exposure prophylaxis (PrEP) is another way to prevent HIV infection, but it may not be available everywhere.
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Pain during receptive anal sex among gay men (or men who have sex with men) is formally known as anodyspareunia.[13] In one study, 61% of gay or bisexual men said they experienced painful receptive anal sex and that it was the most frequent sexual difficulty they had experienced. By contrast, 24% of gay or bisexual men stated that they always experienced some degree of pain during anal sex,[13] and about 12% of gay men find it too painful to pursue receptive anal sex; it was concluded that the perception of anal sex as painful is as likely to be psychologically or emotionally based as it is to be physically based.[13][89] Factors predictive of pain during anal sex include inadequate lubrication, feeling tense or anxious, lack of stimulation, as well as lack of social ease with being gay and being closeted. Research has found that psychological factors can in fact be the primary contributors to the experience of pain during anal intercourse and that adequate communication between sexual partners can prevent it, countering the notion that pain is always inevitable during anal sex.[13][89]
27.“From a straight guy’s perspective: Like a lot of the previous comments, there’s an element of the taboo involved in it. Anal isn’t quite as accepted in ‘mainstream’ sexual discussions yet, and as such remains a bit out of reach for many curious individuals. Having already done anal on occasion with my girlfriend, the taboo is still there but has been transferred from a ‘mysterious and unknown’ sort of taboo to a ‘so rare as to be mystical’ taboo. On the pleasure side of things, it provides a nice change in sensation from vaginal, oral, and manual stimulation. And while it may not provide as much physical pleasure, its infrequency offsets that since it’s not something you’re typically used to like one of the above three. Also, the intimacy factor can’t be overstated. Because it’s such a rare occurrence for most guys (myself included), it carries a lot of weight when your girlfriend/wife/FWB/etc. gives you the opportunity. It requires more trust and communication than regular sex, and oftentimes your SO is sacrificing some of their comfort (and possibly dignity) to give you pleasure. It’s honestly both thrilling and humbling.”

That is a shame, because not only can anal sex be done safely, with no or minimal risk of injury, but it can, in theory, be fun for everyone. The opening of the anus contains tons of nerve endings in people of any gender; it is also close to the "legs" of the clitoris and the vaginal g-spot, and allows stimulation of the prostate, for those who have that anatomy. “I’ve found that I love anal orgasms and get really turned on by gaping,” says Snow. “An anal orgasm is intense for males, making their whole body quiver, or in some cases causing a man or trans woman to ejaculate without ever touching themselves,” says prominent trans porn star Kimber Haven.

Yep — pregnancy. In order for someone to become pregnant, sperm needs to make it into the vagina (and then through the cervix and into the uterus, etc.), and that could be possible (though unlikely) depending on what position you’re in, she explains. So ejaculating in someone’s butt probably isn’t the best idea if you're not also using another form of birth control.


Colon and rectal surgeons are experts in the surgical and non-surgical treatment of diseases of the colon, rectum and anus. They have completed advanced surgical training in the treatment of these diseases as well as full general surgical training. Board-certified colon and rectal surgeons complete residencies in general surgery and colon and rectal surgery, and pass intensive examinations conducted by the American Board of Surgery and the American Board of Colon and Rectal Surgery. They are well-versed in the treatment of both benign and malignant diseases of the colon, rectum and anus and are able to perform routine screening examinations and surgically treat conditions if indicated to do so.
FYI to any haters she likes being tied up, handcuffed, slapped, called slutty names and choked even when sober so no comments about how I took advantage of her drunkenness. I think if she gets into anal she’ll probably want all that and and solid anal pounding. I’m not the one into the choking or pain that’s all her fetish. I just like a good morning blow job I’m actually a bit of a prude other than anal haha but I oblige her, you gotta give to get 😉
Relaxation is key and also making sure you're lubed up. "Like first timers, I mean really wet and slippery trust me sometimes that's the number one problem! The best sex position I've ever felt it in was laying on my stomach and he sneaked it in between my cheeks, laid down on top of me and rubbed my clit with one hand while supporting himself with the other, and whispering dirty things in my ear while nibbling on it," says Jillian Janson, an award-winning adult star.
Most women have a little wild streak in them and want to be a bad girl from time to time. "There's something alluring and mysterious about the dark side of desire. I personally swing between being the sexual dominant (including occasionally pegging my man) to being the submissive (which frequently includes having my guy's dick in my butt!)," says Singer.
Your nerve endings are sensitive for a reason. They alert your brain to pain so you can prevent yourself from getting seriously injured, Dr. Chinn says. While numbing creams might make anal penetration feel easier, they don’t make it any easier physically. By numbing your anus, you or your partner could be pushing your body past its point of comfort without even realizing it.

The risk of getting HIV varies widely depending on the type of sexual activity. Anal sex (intercourse), which involves inserting the penis into the anus, carries the highest risk of transmitting HIV if either partner is HIV-positive. You can lower your risk for getting and transmitting HIV by using condoms the right way every time you have sex; choosing lower risk sexual activities; taking daily medicine to prevent HIV, called pre-exposure prophylaxis (PrEP); and taking medicines to treat HIV if you have HIV, called antiretroviral therapy (ART).
Chlamydia and erectile dysfunction: What's the link? Some people who have chlamydia also experience erectile dysfunction (ED), which involves problems getting or maintaining an erection. Chlamydia can infect the prostate gland, leading to prostatitis, pain, and ED. In this article, learn more about the link between this common infection and ED, and treatments for both. Read now
If you’ve had unprotected anal sex and are worried about possible HIV infection, go and see your healthcare professional straight away. You may be able to take post-exposure prophylaxis (PEP) to prevent HIV infection, but it has to be taken within 72 hours to be effective. However, PEP is not a replacement for condoms and isn’t available everywhere.  
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