The head of the stool is dry and hard with yellow mucus behind the normal, may be caused by excessive stress, but also may be diseases, such as colitis or intestinal insufficiency. 1. Excessive stress: If the mental stress is too great, resulting in high mental tension, it will also affect the gastrointestinal peristalsis, resulting in slowing down the gastrointestinal peristalsis, leading to a decrease in the digestive juices portion, which may cause this situation. 2. Colitis: colitis can lead to feces through the colon will be stimulated, causing mucus secretion is too exuberant, especially when the stool is dry, the stimulus is greater, will lead to a large number of mucus, will cause the front part of the stool mixed with mucus. 2. Intestinal insufficiency: this part of the patient is prone to intestinal dysfunction, but also cause intestinal flora imbalance, resulting in some patients with dry and hard stools in the anterior part, mixed with mucus. It is recommended that patients need to go to regular hospitals for further examination, and need to be treated under the guidance of specialists according to the relevant test results to avoid aggravation of the condition.