Cancer: Do cancer patients experience constipation more often? Experts explained the main reason..
- byShikha Srivastava
- 19 Jan, 2026
Cancer and Constipation Problem: The word cancer strikes fear into everyone's heart. One can only imagine what those battling this disease in hospitals every day must go through. Cancer is not only a devastating illness, but its treatment is even more painful and gives rise to many side effects. Constipation is a common problem among some cancer patients. Is this true? Do cancer patients really suffer from constipation? If so, what are the reasons behind it? Find out here.

According to Dr. Supriya Bambarkar, a cancer surgery specialist at AIIMS Hospital, Mumbai, constipation is common in people suffering from cancer. Often, it is overlooked. Side effects of cancer treatment, lack of sufficient physical activity, dehydration, and mental stress are some of the reasons why many cancer patients experience constipation. Therefore, cancer patients should be aware of the necessary measures to relieve constipation and maintain regular bowel movements.
Constipation is defined as having fewer than three bowel movements per week, difficulty passing stool, or feeling that the bowels are not completely emptied, along with bloating and loss of appetite. Abdominal pain, bloating, gas, nausea, and straining during bowel movements are the main symptoms.
During cancer treatment, such as chemotherapy, surgery, medication, and radiation therapy, patients experience side effects like fatigue and vomiting. Constipation is also a common problem. Cancer and its treatment cause many changes in the way the body functions, which leads to constipation.
There are several reasons why cancer patients experience constipation. In particular, the painkillers, chemotherapy drugs, and anti-nausea medications given during treatment significantly affect bowel motility. In addition, lack of physical activity is a major contributing factor. People suffering from cancer often remain confined to bed due to fatigue and weakness, which slows down the digestive system and bowel movements. Cancer patients often experience loss of appetite, difficulty eating, and nausea, which leads them to consume less fiber, resulting in constipation. Additionally, vomiting, mouth sores, or extreme fatigue can prevent patients from drinking enough water. Dehydration also increases the likelihood of constipation. Furthermore, stress and anxiety related to the illness can affect bowel movements and contribute to constipation. If constipation is not addressed early on, it can lead to serious complications such as severe abdominal pain, hemorrhoids, and anal fissures.
Those caring for cancer patients should ensure that the patient drinks enough water, as this can help alleviate the problem. A diet rich in fiber should be followed as advised by doctors. Experts also recommend that cancer patients engage in light walks or gentle exercises. Constipation medication should not be taken without consulting a doctor.

Cancer patients should avoid straining during bowel movements. If constipation becomes severe or the pain worsens, it is crucial to consult a doctor immediately for proper treatment. Cancer patients should pay close attention to their health, avoid constipation, and strive to maintain regular bowel movements to stay healthy.
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