How can I help my wife from constipation?

She’s been occasionally suffering from constipation. Is this not because she is already 57 years of age? Is it because at our age, digestive system starts to malfunction? And could constipation go to cancerous case?
Many people suffer from occasional constipation. Usually constipation isn’t a serious matter and is correctable and preventable by making a permanent change in eating habits and lifestyle. Increase dietary fiber, water intake to 2-3 liters/day, and increase phsyical activity. The occasional (and I stress occasional) use of a stool softener or laxative is fine. She can speak to her doctor about this and her constipation. Constipation is more common in people over the age of 65. Whether this will lead to cancer or whether the constipation is due to cancer, remains to be seen. There would be other signs and symptoms. At this point, I would not be concerned about it. If her constipation becomes chronic or cannot be remedied by my suggestions, she should report this to he doctor.