Which department should I see for severe constipation?

Name: Which department should I see for severe constipation?
Creator: Which Department
Published: 2026-09-16

2026-09-16 · Neutral information that names no hospital, doctor or region. No rankings, recommendations or reviews.

Short answer

Internal Medicine (내과) or a General Practice clinic is usually the first stop for severe constipation, as doctors there can assess overall digestive function and rule out common causes. If a structural or anorectal issue is suspected, you may be referred to Colorectal and Anal Surgery (항문외과) or Gastroenterology (소화기내과) for further evaluation.

Which department

1Internal Medicine (내과)
Internal Medicine physicians handle a broad range of digestive complaints, including constipation, and can evaluate systemic causes such as metabolic or hormonal factors that may be contributing to the symptom. — First / second line: Visiting a local clinic (의원) in Internal Medicine is generally the practical first step; if the cause is unclear or symptoms are persistent, the physician will typically refer you to a specialist.
2Gastroenterology (소화기내과)
Gastroenterologists specialize in the digestive tract and can assess the colon and rectum in greater depth, which is relevant when constipation is chronic, severe, or accompanied by other digestive symptoms. — First / second line: You may start here directly at a clinic level if your constipation has been long-standing, or you may be referred here from Internal Medicine when a more detailed gastrointestinal workup is considered appropriate.
3Colorectal and Anal Surgery (항문외과)
This department focuses on structural conditions of the colon, rectum, and anus — such as issues with the outlet or rectal function — that can present as or worsen constipation. — First / second line: A referral to this department is generally considered when an anorectal structural cause is suspected, or when constipation is accompanied by rectal discomfort, a sensation of incomplete emptying, or visible changes around the anal area.
4Pediatrics (소아청소년과) or Geriatric Medicine (노인의학과)
Children and older adults often have constipation patterns and contributing factors that differ from the general adult population, and age-specific departments are equipped to account for those differences. — First / second line: For young children, starting at a Pediatrics clinic is generally recommended; for frail older adults, a geriatric or internal medicine consultation is typically the appropriate entry point before specialist referral.

Go to the ER / call 119 if

If any of the following applies, do not choose a department — go to an emergency room or call 119 (Korea's emergency number).

Constipation accompanied by bright red blood or dark tarry stools from the rectum
Sudden inability to pass gas or stool along with a visibly distended and rigid abdomen
Severe abdominal pain that is constant, worsening rapidly, or unbearable
Constipation following a recent abdominal injury or surgery with sudden deterioration
Unexplained significant weight loss occurring alongside the constipation

Before your visit

Note the exact date when normal bowel habits changed and how the pattern has shifted since then.
Record how many days typically pass between bowel movements and whether stools are hard, pellet-like, or painful to pass.
List all medications, supplements, and herbal products you are currently taking, as many can contribute to constipation.
Note any associated symptoms such as abdominal bloating, nausea, rectal pain, blood in stool, or a feeling of incomplete emptying.
Bring results of any previous abdominal imaging, blood tests, or colonoscopy if you have had them done.
Be ready to describe your usual diet, fluid intake, and physical activity level, as these are routinely asked during the consultation.

General principles

Constipation is a symptom rather than a single disease, which means the appropriate department depends on the suspected underlying cause. In the Korean healthcare system, it is generally practical to begin at a local clinic (의원) — typically Internal Medicine or a General Practice — before being directed to a specialist.

When constipation is evaluated by a specialist such as a gastroenterologist, the assessment commonly involves understanding how the colon moves contents (transit) and how the outlet functions (defecation mechanics); the specific approach is determined by the consulting physician based on the individual's history.

Colorectal and Anal Surgery addresses cases where the rectum or anus itself may be contributing to difficult defecation, and is distinct from Gastroenterology in that it focuses more on structural and surgical aspects of the lower digestive tract.

Under the Korean National Health Insurance system, visiting a secondary or tertiary hospital (병원·종합병원) for a non-emergency condition generally requires a referral letter (진료의뢰서) from a primary clinic; this is worth confirming at the clinic before proceeding to a larger hospital.

FAQ

Should I go to a local clinic or a large hospital for severe constipation?

In general, starting at a local clinic (의원) is advisable, as the physician there can perform an initial assessment and issue a referral if a hospital-level evaluation is needed. Going directly to a large hospital without a referral may not be covered under standard National Health Insurance arrangements, so confirming this step with the clinic first is usually the practical approach.

How is Gastroenterology different from Colorectal and Anal Surgery for constipation?

Gastroenterology generally focuses on the function and lining of the entire digestive tract, including the colon, while Colorectal and Anal Surgery concentrates more on structural conditions of the rectum and anus. A physician will typically guide you toward the more appropriate specialty based on your specific symptom pattern and any findings from an initial assessment.

What kinds of examinations are generally done for constipation at a specialist clinic?

The types of examinations considered for constipation vary widely depending on the patient's history and the physician's judgment; they may relate to colon structure, transit time, or outlet function. The decision on which, if any, investigations are appropriate is made by the consulting physician after reviewing your symptoms — a general information source cannot determine this in advance.

Is the approach different for an elderly person with severe constipation?

Older adults may have constipation related to factors such as reduced mobility, multiple medications, or age-related changes in bowel function, and physicians generally take these into account when assessing the symptom. Starting at an Internal Medicine clinic experienced with older patients, or a geriatric specialist if available, is commonly considered appropriate before any specialist referral.

Find a clinic (external directories)

External directories for finding a clinic by region once you know the department (public data, no rankings or recommendations).

Hospital directory by region (koreahospital.org)

This page is general medical information and does not replace diagnosis, treatment or choosing a clinic. Consult a doctor for any symptom. In an emergency, go to the ER or call 119 immediately.