Constipation (medically: obstipation) describes a delayed or difficult bowel evacuation, usually accompanied by infrequent stools or the feeling of incomplete emptying. It's not only the frequency of bowel movements that matters, but above all the individual's perception.
From a medical perspective, not every deviation from the usual rhythm represents a disease. Stool frequency can vary greatly depending on diet, lifestyle, physical condition and mental state. Three bowel movements per week are still considered acceptable as long as there are no complaints.
Digestion is a complex process in which food is transported from the mouth to excretion through different sections of the digestive tract. If this is disrupted – for example by slowed intestinal movement, reduced muscle activity or faulty nerve control – transit of intestinal contents can come to a halt. In the process, water is increasingly removed from the stool, making it hard and dry.
Constipation often causes various symptoms affecting both the stool itself and general well‑being. A clearly less frequent bowel movement than usual is a typical main sign. The stool is often hard, dry or lumpy. Emptying the bowel usually requires strong straining and is associated with pain. Many affected people feel that the bowel has not been completely emptied, or even perceive a blockage in the rectum.
In addition to these leading symptoms, other problems may occur. An unpleasant feeling of fullness or the sensation of a “bloated belly” are not uncommon. Wind and pressure sensations in the abdominal area frequently occur. They arise because gases accumulate due to slowed digestion and cannot escape. This can lead to meteorism and occasionally to abdominal pain.
In some cases, constipation can lead to irritation in the rectal area. Intense straining can cause small tears in the anus, which manifest as pain during bowel movements or as visible traces of blood. Enlargement and prolapse of haemorrhoids are also possible due to the increased pressure.
Further accompanying symptoms include loss of appetite, general malaise and, in more pronounced cases, nausea or heartburn. With significant gas accumulation, breathing difficulties, chest pain or dizziness may even occur, especially when the trapped gas cannot be released and accumulates in the abdominal cavity.
The causes of constipation are diverse and can be functional or organic in nature. A low‑fibre diet, insufficient fluid intake and lack of physical activity are common reasons for slowed intestinal activity. Nevertheless, constipation does not occur in all people with these habits, indicating individual differences in bowel function.
Physical changes can also impede stool transport. These include, for example, intestinal polyps, tumours, inflammatory processes or mechanical obstacles due to pelvic floor weakness. In some cases the cause is excessive tension of the pelvic floor or sphincter muscles.
Numerous medications can dampen bowel activity. People taking opioids, antidepressants, antiepileptics, diuretics or certain blood‑pressure drugs are particularly affected. Excessive or incorrect use of laxatives can also impair bowel function in the long term.
Neurological and hormonal influences also play a role. Conditions such as Parkinson's disease, multiple sclerosis or diabetes, but also thyroid disorders and hormonal changes – for example during pregnancy or the menstrual cycle – can disrupt normal bowel evacuation. Constipation also becomes more common with age, for instance due to reduced mobility or the intake of multiple medications.
Changes in daily routine, such as travel, hospital stays or an unfamiliar daily schedule, can further affect digestive rhythm. Repeatedly suppressing the urge to defecate can also trigger constipation. In some chronic cases structural changes in the bowel wall or nerve supply are observed, whose significance is not yet fully understood.
Acute and chronic constipation differ both in their time course and in their causes. Acute constipation usually appears suddenly and lasts only briefly, while chronic constipation develops gradually and persists for a longer period.
Acute constipation often occurs in connection with short‑term changes in daily life, for example due to travel, stressful periods or an unfamiliar diet. As a rule, the complaints subside after a few days. However, severe symptoms or accompanying signs such as nausea or vomiting may indicate a more serious cause.
Chronic constipation is diagnosed when symptoms occur regularly for at least three months. It usually develops slowly and can become a persistent burden. Affected individuals often report a constant feeling of incomplete emptying or persistent straining with bowel movements.
Besides these two main forms there are transitional types in which the symptoms cannot be clearly assigned to one category. For example, situational constipation may occur when external circumstances such as shift work or short‑term medication disturb the digestive rhythm. These complaints can be temporary and subside on their own once the trigger is removed.
A medical consultation is advisable for persistent or recurrent constipation and for conspicuous accompanying symptoms. This is especially true if the frequency or nature of bowel movements suddenly changes, for example if bowel movements become markedly less frequent or the stool consistency changes significantly.
Medical help is urgently required if alarm symptoms such as blood in the stool, unexplained weight loss or severe abdominal pain occur. Likewise, symptoms such as nausea, vomiting, fever or a markedly distended abdomen should not be ignored, particularly if stool passage is completely absent. These signs may indicate an intestinal obstruction, which is considered an acute emergency and must be treated immediately.
Also, if for several weeks you have fewer than two bowel movements per week, this should not be taken lightly. Persistent constipation can lead in the long term to serious complications such as haemorrhoids, mucosal tears or even rectal prolapse. In such cases a medical examination is necessary to exclude underlying conditions such as metabolic disorders or bowel diseases.
Constipation is unpleasant but generally manageable. With the right measures and some patience, digestion can be brought back into lasting balance.