Hello and welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. As per your complain you have problem of chronic constipation problem. Lack of gastric motility cause constipation problem. In hypothyroidism case constipation problem also occurs. Intestinal obstruction lead to chronic constipation problem. If you have problem of constipation relive by diarrhea than think about irritable bowel syndrome. Start a treatment according to cause. Take bulk forming agent like psyllium is helpful to you. Stool softner can use for chronic constipation problem. As you mentioned you are taking high fiber food and more water continue it. Drink water more during daytime. Avoid gaseous foods like cabbage, cauliflower and carbonated drinks etc. Kiwi and peaches are helpful in digestion. Bowel habit training is helpful. Abdominal barium x ray helpful for further diagnosis. Colonoscopy can done if needed. Consult a gastroenterologist for further diagnosis. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Rachana Goswami