This is about my mother. She tends to have constipation once every two or three months. She currently is constipated, has gas, stomach aches, dizzyness, a headache, and is extremely cold. She is shivering a lot, and keeps on complaining that she is cold. We have the heat on, and she is covered in a huge, warm comforter. How serious is this? Any ideas on what it is? What should I do?