Which of the following is an abnormal change in the digestive system that should be reported?

Dark, hard stools indicate an abnormal change in the digestive system that requires attention. This condition, known as constipation, can be caused by various factors, including dehydration, insufficient dietary fiber, or certain medications. When stools are particularly dark or hard, it may also signal potential underlying issues such as bleeding higher up in the gastrointestinal tract, leading to the darker color due to the presence of digested blood.

Recognizing and reporting abnormal stool characteristics is crucial for a certified nursing assistant, as these observations can help healthcare providers assess a patient's digestive health and overall well-being. Proper bowel function and consistency are essential for the body's ability to eliminate waste effectively, and any significant change can be indicative of a more serious underlying condition that may require further evaluation or intervention.