Cryptitis: When anal crypts become inflamed, leading to anal fistulas and perianal abscesses

Cryptitis is an inflammatory process in the rectum. The name of the condition derives from the Lieberkühn crypts. These are pouch-like recesses located in the section of the intestine known as the anal canal. The crypts are surrounded by the anal papillae, which are elongated longitudinal folds within the anal canal.

Everyone has 10 to 15 crypts arranged in a circular pattern in the lower part of the large intestine, 2 to 3 cm above the anal opening. When healthy, these crypts—which are 1 to 2 mm deep—do not cause any symptoms. However, if they become inflamed, they are tender to the touch and painful.

Inflammation of the crypts is caused by problems with bowel movements. If feces enter these pouch-like recesses and remain there, the area becomes inflamed and tender to pressure.

Lieberkühn’s crypts are located in the anal canal @ bilderzwerg /AdobeStock

The pain caused by cryptitis is almost always related to bowel movements. However, it does not necessarily occur immediately after a bowel movement. 

Often, the pain from the pressure-sensitive crypts does not appear until one to two hours later. It can frequently persist throughout the day. 

Occasionally, the anal area may ooze or be smeared with discharge. Sometimes, temporary bleeding occurs after a bowel movement. In addition to pain, itching and a burning sensation in the anal region are typical symptoms of cryptitis. Some patients also report a sensation of a foreign body in the lower colon.

Soft, mushy stools are just as likely to cause cryptitis as hard stools associated with constipation. Due to its consistency, soft stool easily enters the crypts, where it occasionally remains as residue. 

With hard stools, straining during bowel movements can cause stool to become lodged in one or more crypts. The stool may be so hard that it injures the delicate intestinal mucosa, which further promotes inflammation.

For some affected individuals, a vicious cycle develops: they hold back their bowel movements to delay going to the bathroom or reduce the frequency. 

In cases of constipation, this causes the stool to harden further, exacerbating bowel movement difficulties and the resulting symptoms, including pain. In addition, some patients reduce their food intake in an effort to decrease the number of bowel movements.

For general reassurance, it should be noted that such fecal impaction in the crypts of the large intestine is rare. Normally, you do not need to expect this to happen. 

It is good for you to be aware of this. However, there is a risk of cryptitis if you have problems with bowel movements. If these problems occur regularly in the form of constipation, it is advisable to take measures to address them. The goal is to achieve softer and more pliable stool.

Progressive inflammation can easily lead to the formation of an abscess or a fistula, often accompanied by fever and fatigue. 

If you suspect cryptitis, an immediate visit to the doctor is recommended. Many affected individuals still delay seeing a doctor out of embarrassment. 

To them we say: What may seem like an unpleasant and unusual situation for patients is simply part of a doctor’s daily routine—nothing out of the ordinary. A visit to the doctor is essential when dealing with cryptitis. The sooner, the better. 

Complications that may arise, including infections and possible sepsis, are clearly linked to delaying a visit to the doctor and the start of treatment.

The first point of contact for intestinal disorders, including cryptitis, is often the primary care physician. If necessary, they traditionally act as a guide to refer the patient to colleagues who specialize in specific conditions. As an intestinal specialist, the proctologist is the medical specialist responsible for treating cryptitis.

At the beginning of the examination, the doctor thoroughly palpates the affected section of the intestine from the inside with his finger. He uses a speculum and a probe as supplementary diagnostic tools. 

Because the symptoms of cryptitis resemble those of hemorrhoids, misdiagnoses occasionally occur. A colonoscopy provides additional clarity in establishing the diagnosis.

In addition to pain, itching and, often simultaneously, a burning sensation in the anal region are typical symptoms of cryptitis @ methaphum /AdobeStock

As distressing as cryptitis may be for those affected, it is fortunately easily treatable. The first step is to treat the inflammation in the anal area. 

To do this, the doctor prescribes:

• medications
• soothing and anti-inflammatory ointments or
• suppositories

Suppositories are particularly convenient and safe for patients to use. 

The next step involves tips for dietary changes: Stools should be of medium consistency—neither too soft nor too hard.

The doctor will also show you exercises for the sphincter muscle that help improve blood flow to the anal area.

In cases of more severe inflammation, such as abscesses and fistulas, medication alone is not sufficient. Therefore, a surgeon must remove the affected areas. Experience shows that patients recover quickly after cryptitis surgery. They can leave the hospital after just a few days.

Treatment of cryptitis, when started as early as possible, is usually brief and almost always leads to complete relief of symptoms.

In contrast, delayed or absent treatment carries the risk of serious health complications. The intestine may lose its ability to function in certain areas. Tumors and even premature death are further risks associated with delayed or absent treatment of cryptitis.

Although successfully treated cryptitis does not prevent recurrence, greater awareness of the condition helps patients recognize the early signs of cryptitis. Prevention is of particular importance.

The cause of the condition is also the key to preventing cryptitis: Eat a balanced diet rich in fiber.

Drink enough fluids—at least 1.5 liters daily. The fiber found in whole foods rich in vegetables, fruits, and whole grains stimulates digestion. Limit your meat intake. Avoid constipation. You should only take laxatives in exceptional cases.

Exercise also stimulates bowel activity and thus helps prevent cryptitis. It can be sports, but it doesn’t have to be. Walk a lot in your daily life, ride a bike, and take the stairs instead of the elevator.

A characteristic of cryptitis is the presence of pouch-like recesses in the rectum filled with feces. Cryptitis develops from these feces-filled crypts. The inflamed crypts are very sensitive to pressure and pain. An immediate visit to the doctor is strongly recommended.

Cryptitis is unpleasant and often embarrassing for those affected. However, it has a good chance of recovery if treatment is started as early as possible. A dietary change tailored to your risk of developing the condition also offers a promising means of prevention.

Cryptitis is an inflammatory condition of the anal crypts in the rectum, usually caused by bowel movement disorders, which can lead to painful symptoms.

Typical symptoms include delayed-onset pain after a bowel movement, tenderness, itching, burning, and occasionally a sensation of a foreign body.

The main causes are hard or very soft stool consistency, which facilitates the entry of feces into the crypts or a single crypt, as well as secretion retention and infection of the anal gland. 

Diagnostic methods include digital rectal examination, proctoscopy, probing, and, if necessary, ultrasound or endosonography. The clinical picture can easily be confused with hemorrhoids or an anal fissure. 

Treatment initially consists of local measures to reduce inflammation, regulate stool consistency, and promote anal hygiene; surgery is necessary in cases of abscess or anal fistula.

If cryptitis is detected early, it can usually heal completely, whereas untreated cases can lead to anal abscesses and anal fistulas, perianal abscesses, and other acute symptoms, as well as chronic conditions. 

The risks can be significantly reduced through a high-fiber diet, adequate fluid intake, regular exercise, and the prevention of constipation.

Technical classifications can be found, among other sources, in the current issues of *Proktologie*, *DGIM Innere Medizin*, publications by Springer, and international classifications such as *Anorectal Fistulae* and *Pelvic Floor Disorders*.

What are the typical symptoms of cryptitis?

Characteristic symptoms include delayed-onset pain after a bowel movement, marked tenderness in the anal area, as well as burning, oozing, or a sensation of a foreign body. Occasional light bleeding may occur, especially after a bowel movement.

What are the causes and risk factors for cryptitis?

The condition is usually triggered by bowel movement issues: hard stools due to constipation or very soft stools that easily enter the anal crypts. Secretion retention, infections of the anal glands, or repeated straining also increase the risk.

How is cryptitis diagnosed and treated?

The diagnosis is made through a proctological examination involving a digital rectal exam, proctoscopy, and, if necessary, additional imaging. Treatment includes local anti-inflammatory measures, regulating stool consistency, and hygiene support. Surgical intervention is necessary in cases of abscesses or fistula formation.