If someone is experiencing abdominal pain and diarrhea with red mucus, it is important to monitor the situation. If the symptoms persist for more than 3 to 5 days, or if there is worsening of the condition, it is advisable to consult a doctor as a precaution. Pain relievers like acetaminophen may help manage the pain. It is also recommended to stick to light foods such as soups, broths, toast, and eggs, while avoiding heavy, sugary, or spicy foods. Remember to seek medical advice if needed.