A bulge near the anus that looks like it could be a hernia is most often a perineal hernia, a rectal prolapse, or prolapsed hemorrhoids, and telling these apart from the outside can be genuinely difficult even for clinicians. A true perineal hernia appears as a soft, reducible bulge in the area between the anus and the genitals (or sometimes alongside the anus itself) that becomes more prominent when you stand or strain. It may feel squishy or doughy because it contains abdominal contents like fat or intestine that have pushed through a weakness in the pelvic floor. What makes the visual picture confusing is that rectal prolapse and prolapsed hemorrhoids can look strikingly similar at first glance, and most people searching for “hernia on the anus” are seeing one of those more common conditions rather than a true hernia.
Why People Confuse These Conditions
A mass protruding from or near the anal opening is the shared visual feature of several different conditions, and the overlap is significant enough that emergency physicians sometimes struggle with the distinction. Complete rectal prolapse and prolapsed internal hemorrhoids both present with a mass coming through the anal opening, bleeding, mucus discharge, and sometimes fecal incontinence.1PubMed Central. Complete rectal prolapse vs prolapsed hemorrhoids: points to ponder A perineal hernia can add to the confusion because it produces a bulge in the same general neighborhood, though its position tends to be slightly off-center from the anal canal itself.
Here is a rough guide to what each condition looks like from the outside:
- Prolapsed hemorrhoids: Swollen, grape-like clusters of tissue protruding from the anus, often dark red or purplish and tender. They tend to bleed with wiping and may retract on their own or be pushed back in.
- Rectal prolapse: A larger, concentric ring of reddish tissue that slides out of the anus, sometimes several centimeters long. It looks like a tube of wet, folded tissue and has visible circular rings or ridges.
- Perineal hernia: A soft, rounded bulge appearing to one side of the anus or in the perineum (the area between the anus and genitals), often without the dark red color of hemorrhoids. It may feel like something is pushing outward from deeper inside the pelvis rather than sliding out of the anal canal.
The key visual difference is location. Hemorrhoids and rectal prolapse come through the anal opening. A perineal hernia bulges through the pelvic floor muscles near but not directly through the anus, so the lump appears adjacent to it. That said, a large perineal hernia can distort the anatomy enough that the distinction becomes blurry without imaging.
What a Perineal Hernia Actually Looks Like
Perineal hernias are uncommon, and most people will never see one outside a medical setting. When they do appear, the hallmark is a soft bulge near the anus that becomes more visible when the person stands up or bears down. In one reported case, a patient examined in an upright position had a herniation bulging out on one side of the anus, with the small intestine visible through the skin.2PubMed Central. Robot-assisted laparoscopic repair of perineal hernia after abdominoperineal resection: A case report and review of the literature That is an extreme presentation, but it illustrates the principle: perineal hernias contain abdominal structures (bowel loops, fat, or omentum) that have slid downward through a gap in the pelvic floor.
Anterior perineal hernias, which bulge toward the front of the pelvis, can be even harder to spot. One case involved a woman with bulging of the labial area while standing that was only confirmed by ultrasound, because CT and MRI scans performed while she was lying down failed to detect it.3PubMed Central. Primary anterior perineal hernia: A case report and review of the literature This highlights something important: perineal hernias are position-dependent. They often appear only when gravity is pulling abdominal contents downward, and they may vanish when you lie down. If you notice a bulge near your anus or perineum that comes and goes with position changes, that pattern is more consistent with a hernia than with hemorrhoids or prolapse.
Who Gets Perineal Hernias
The vast majority of perineal hernias are secondary, meaning they develop after pelvic surgery. The most common culprit is abdominoperineal resection, a major operation for rectal cancer in which the anus and rectum are removed entirely.4PubMed Central. A three layered repair of a large perineal hernia: case report and review of the literature When the rectum is gone, it leaves an empty space in the pelvis, and the muscles and tissue that once surrounded it may not hold together. Abdominal contents can then push downward into that gap and eventually bulge outward near where the anus used to be (patients after this surgery have a permanent colostomy).
Primary perineal hernias, those arising without prior surgery, are genuinely rare. They tend to occur in older women, likely because the pelvic floor weakens with age, childbirth, and hormonal changes. One case involved a woman with neurofibromatosis who presented with obstructed bowel movements and a large perineal hernia.5PubMed Central. Neurofibroma invading into urinary bladder presenting with symptoms of obstructed defecation and a large perineal hernia Connective tissue disorders and conditions that chronically increase abdominal pressure, like severe constipation, can contribute.
If you have not had pelvic surgery, the bulge you are seeing near your anus is far more likely to be prolapsed hemorrhoids or rectal prolapse than a true perineal hernia. That does not mean it should be ignored, but it does change the likely diagnosis.
Rectal Prolapse and Why It Mimics a Hernia
Rectal prolapse deserves its own discussion because it is the condition most commonly mistaken for a hernia at the anus. In full-thickness rectal prolapse, the rectum turns itself inside out and slides out through the anal opening, producing a fleshy, tube-like mass that can extend several inches. It looks alarming, and people understandably describe it as something “coming out” or “herniating” from the anus.
Rectal prolapse has a bimodal distribution: it shows up in young children and in older adults, especially women. In younger patients, medication-induced constipation and pelvic floor weakness from prior pelvic surgery may be contributing factors.6Journal of Visceral Surgery. Risk factors and clinical characteristics of rectal prolapse in young patients In children specifically, rectal prolapse has historically prompted screening for cystic fibrosis, though the overlap is small. A retrospective review found that about 3.5% of children with cystic fibrosis had rectal prolapse, and about 3.6% of children presenting with rectal prolapse turned out to have cystic fibrosis.7PubMed Central. Rectal prolapse and cystic fibrosis With the advent of newborn screening for cystic fibrosis, this connection is caught earlier now, but pediatricians still keep it in mind.
To tell rectal prolapse from prolapsed hemorrhoids by sight, look at the pattern of folds. Rectal prolapse has concentric, ring-like folds because the full wall of the rectum has folded outward. Prolapsed hemorrhoids have radial folds, like the segments of a flower, because only the cushioned tissue has ballooned out. Both are different from a perineal hernia, which does not involve tissue sliding out through the anal canal at all.
How Doctors Confirm the Diagnosis
Physical examination while standing or straining is the first step, but imaging is often needed because perineal hernias and pelvic floor abnormalities can be subtle. Dynamic MRI defecography, where a patient is scanned while simulating a bowel movement, is the preferred tool for mapping the pelvic floor. It picks up anatomical and functional abnormalities and is especially useful when multiple compartments of the pelvis are involved.8PubMed. The role of dynamic MRI defecography in the diagnostic algorithm of patients with anorectal dysfunction
Conventional radiology (fluoroscopic defecography) and MRI each have strengths depending on the specific type of herniation. MRI has perfect specificity for pelvic floor hernias, meaning if it says there is one, there almost certainly is. However, its sensitivity varies by hernia type. For detecting fat-containing hernias of the omentum, sensitivity is around 95%, but for hernias containing loops of small bowel, it drops to about 65%, which means MRI misses roughly a third of those.9PubMed Central. Role of conventional radiology and MRi defecography of pelvic floor hernias Conventional fluoroscopy can actually outperform MRI for certain hernia types, which is why some centers use both.
The position-dependent nature of perineal hernias adds a diagnostic wrinkle. As noted in the case of the anterior perineal hernia, imaging performed while a patient lies flat can miss a hernia that only appears while standing.3PubMed Central. Primary anterior perineal hernia: A case report and review of the literature If you are being evaluated and your bulge only shows up when you are upright, mention that to your doctor, because the examination and imaging may need to be done in that position.
When a Bulge Near the Anus Is an Emergency
Most bulges near the anus are uncomfortable but not dangerous. The exception is when a hernia becomes incarcerated or strangulated, meaning its contents get trapped and their blood supply is cut off. With perineal hernias, this can involve loops of small bowel becoming stuck in the pelvic floor defect, leading to bowel obstruction.
One case report describes incarcerated small bowel that had herniated through a perineal defect, causing strangulation that required emergency surgery.10PubMed Central. Rare case of strangulated primary acquired perineal hernia causing small bowel obstruction requiring emergency operative repair Another documents a patient with strangulated bowel obstruction from a perineal hernia following rectal surgery, where imaging showed intestinal swelling and compromised blood flow. At surgery, the bowel wall was thickened and edematous but had not yet died or perforated.11PubMed Central. Ileal strangulation by a secondary perineal hernia after laparoscopic abdominoperineal rectal resection: A case report
Signs that a bulge near the anus may be strangulated and needs immediate medical attention include sudden severe pain, the bulge becoming hard and impossible to push back in, nausea and vomiting, inability to pass gas or stool, and skin over the bulge turning dark or dusky. These symptoms demand an emergency room visit because strangulated bowel can become necrotic within hours.
Surgical Options for Perineal Hernias
Small, asymptomatic perineal hernias can sometimes be monitored without surgery, but symptomatic ones generally need repair. There is no single standardized approach, and surgical technique tends to be tailored to the individual. The repair can be approached from the abdomen, the perineum, or both.
Mesh repair is currently the most common technique, but recurrence rates remain a persistent problem. A multicenter study comparing mesh-only repair with mesh combined with a tissue flap found that about a third of mesh-only patients experienced recurrence, compared to about one in seven patients who had mesh plus a tissue flap. The absolute difference was around 20 percentage points, though the study was small enough that the difference did not reach statistical significance.12PubMed Central. Perineal hernia repair: Multicentre comparative analysis of mesh-only versus mesh combined with tissue flap The trend, however, has pushed many surgeons toward combining mesh with flap reconstruction for larger defects.
A combined abdominal and perineal approach with biological mesh and peritoneal flap reconstruction has also been described as successful for large, symptomatic perineal hernias.13PubMed Central. Perineal hernia repair with a combined abdominoperineal approach with biologic mesh placement and peritoneal flap reconstruction The lack of standardization means that the surgeon’s experience with the technique matters a great deal, and patients facing this repair should ask how many the surgeon has performed.
Surgery for Rectal Prolapse
Because rectal prolapse is the more likely diagnosis for most people searching this topic, the surgical landscape for prolapse is worth knowing. Approaches fall into two broad camps: abdominal operations (where the rectum is lifted and fixed from inside the abdomen) and perineal operations (where the prolapsed tissue is addressed from below).
Abdominal approaches, especially laparoscopic rectopexy, consistently show lower recurrence rates and better functional outcomes than perineal techniques. One review found that laparoscopic operations also had lower mortality and complication rates.14PubMed Central. Rectal Prolapse Surgery: Balancing Effectiveness and Safety in Abdominal and Perineal Approaches However, perineal procedures remain valuable for elderly or high-risk patients because they can be performed under regional anesthesia and are less physiologically taxing.
A comparative study of minimally invasive rectopexy versus perineal rectosigmoidectomy found that the minimally invasive abdominal approach had a significantly lower 30-day complication rate and that a much higher proportion of patients achieved normal bowel function afterward.15Turkish Journal of Colorectal Diseases. Minimally Invasive Mesh Rectopexy versus Perineal Rectosigmoidectomy in the Elderly: a Retrospective Comparative Analysis Recurrence rates between the two groups were similar, which is somewhat reassuring for patients who cannot tolerate an abdominal approach.
Non-Surgical Management
Not every prolapse or pelvic floor bulge requires surgery. Current guidelines recommend that all symptomatic patients be offered non-surgical treatment first, including pelvic floor physical therapy or a pessary trial.16PubMed. Nonoperative Management of Pelvic Organ Prolapse A pessary is a silicone device inserted into the vagina that helps support the pelvic organs and can relieve the sensation of bulging. Pelvic floor exercises, when taught properly by a physiotherapist, strengthen the muscles that hold everything in place.
For hemorrhoids, conservative measures like dietary fiber, adequate hydration, topical treatments, and avoiding prolonged straining are effective for most people. Prolapsed hemorrhoids that do not respond to these measures can be treated with office procedures like rubber band ligation before surgery is considered. The point is that a visible bulge near the anus does not automatically mean you need an operation. A proper diagnosis comes first, and for the majority of causes, nonsurgical options exist.
Rare Pelvic Hernias That Can Cause Buttock Masses
While most people asking about a hernia near the anus are seeing hemorrhoids or prolapse, there are genuinely rare hernias in the pelvic region worth knowing about. Sciatic hernias occur when abdominal contents push through the sciatic foramen, the bony opening in the pelvis that the sciatic nerve passes through. These tend to produce a mass in the buttock area rather than near the anus itself. One case involved a woman who developed a fist-sized mass in her left buttock with pain radiating down the back of her thigh, caused by a loop of intestine herniating through the sciatic foramen.17PubMed Central. Sciatic hernia led to strangulated ileum and ipsilateral ovary: A case report and review of literature
Sciatic hernias are notoriously difficult to diagnose because most patients, roughly four out of five, do not have an external bulge at all.18PubMed. Systematic Review of Ischiatic Hernia: Diagnostic Challenges, Surgical Evolution, and Outcomes Instead, they present with vague pelvic pain, sciatica-like symptoms, or bowel obstruction. Congenital cases are extremely rare, though one documented case involved a newborn with a sciatic hernia containing a rectal duplication.19PubMed Central. Rectal duplication with sciatic hernia These conditions occupy a different clinical universe from common anal complaints, but awareness of them matters because a deep pelvic hernia that goes undiagnosed can lead to bowel strangulation.
The Emotional Side of Anal and Pelvic Symptoms
People often wait far too long before seeking help for a bulge near the anus, and the reasons are understandable. Qualitative research on women with pelvic organ prolapse found that patients experienced feelings of isolation, shame, and a sense of being “broken” or “defective,” and that they found discussing their symptoms extremely difficult.20PubMed Central. The Emotional Burden of Pelvic Organ Prolapse in Women Seeking Treatment: A qualitative study Fear of social stigma was a significant factor driving delays in treatment-seeking, alongside low income and lack of support systems.21PubMed Central. Factors associated with delay in seeking treatment among women with pelvic organ prolapse at selected general and referral hospitals of Southern Ethiopia, 2020 Other research has documented additional barriers including wrong perceptions about the condition, lack of awareness, and reliance on alternative healing methods.22International Journal of Africa Nursing Sciences. Pelvic organ prolapse and reasons for delay in treatment-seeking among women in Dessie Zuriya Woreda, Northeast Ethiopia, 2022
These studies focused on pelvic organ prolapse specifically, but the emotional dynamics apply broadly to anyone noticing something abnormal near their anus. Embarrassment keeps people Googling instead of making an appointment. The irony is that the conditions most commonly responsible for a visible bulge near the anus, hemorrhoids and rectal prolapse, are among the most treatable problems in colorectal medicine. A doctor who specializes in this area has seen thousands of these presentations and is not going to be surprised or judgmental about yours. If you have been living with a bulge, discomfort, or the unsettling sensation of something coming out, bringing it up with a healthcare provider is the single most useful step you can take.