Constipation can have many causes, often related to lifestyle habits, but sometimes to physiological or medical factors:
Constipation and lifestyle
An insufficient intake of fruits and vegetables can lead to chronic constipation, as fibre is essential for the proper functioning of the digestive system. Not drinking enough water prevents the intestines from functioning properly, making stools harder and more difficult to pass. Lack of physical activity slows down bowel movements, worsening constipation. Finally, holding in a bowel movement for too long allows the colon to absorb more water from the stool, making it harder to pass.
Psychological factors and changes in routine
Stress activates the sympathetic nervous system, which inhibits digestion. This slows down intestinal transit and can cause constipation. Life changes such as travel, prolonged bed rest, or a change in diet can cause occasional constipation.
Physiological and mechanical causes
The progesterone secreted during pregnancy slows down bowel motility, and the pressure of the foetus on the organs can worsen constipation. Irritable Bowel Syndrome (IBS) often causes alternating episodes of constipation and diarrhoea.
Medical conditions and medication use
Constipation can be associated with conditions such as diabetes, hypothyroidism, Parkinson’s disease, or multiple sclerosis. Certain medications, including opioid-based pain relievers, anti-inflammatories, and antidepressants, can cause constipation.