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The three major concerns with diarrhea are dehydration, nausea/vomiting, and fatigue. Get plenty of rest, and seek medical attention if any of these symptoms grows severe. You can also ask your doctor whether he recommends an over-the-counter anti-diarrheal like Imodium.Caution: If you have a C. diff infection and use Imodium for more three days to try to stop diarrhea, you will be retaining dangerous toxins caused by C. diff which can seriously effect the kidneys, liver and intestines, etc.    {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/6\/64\/Cure-Colitis-Step-14-Version-2.jpg\/v4-460px-Cure-Colitis-Step-14-Version-2.jpg","bigUrl":"\/images\/thumb\/6\/64\/Cure-Colitis-Step-14-Version-2.jpg\/aid3781466-v4-728px-Cure-Colitis-Step-14-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":"728","bigHeight":"546","licensing":"<div class=\"mw-parser-output\"><p>License: <a rel=\"nofollow\" class=\"external text\" href=\"https:\/\/creativecommons.org\/licenses\/by-nc-sa\/3.0\/\">Creative Commons<\/a><br>\n<\/p><p><br \/>\n<\/p><\/div>"} While diet is not the cause of colitis, certain foods can agitate your symptoms and make the condition worse. Foods that are rough on your stomach or intestines should be cut out of your diet as much as possible.  Dairy can make symptoms dramatically worse, especially if you are lactose intolerant. When you do have dairy, take an enzyme product that can help break down the problematic lactose in dairy. Avoid high fiber foods (fruits and vegetables), or cook them to break down the fiber. Cut out gas-producing foods (carbonated drinks or caffeine), as well as fatty, greasy, or fried foods. Instead, eat digestible, bland foods like clear soup, crackers, toast, bananas, rice, and applesauce. If you're actively vomiting, you should stick with clear liquids alone until you can hold them down. Small meals are less likely to trigger your symptoms. Large meals, on the other hand, can overwhelm your digestive tract and cause a colitis flare-up. Switch from two or three large meals each day to five or six small ones. Give your digestive system a week or so to adjust, and continue on this schedule if it improves your symptoms. If not, you can probably switch back to your previous routine. Hydration is important both for bacterial infection and IBD. The diarrhea from bacterial infection can dangerously dehydrate the body. If you have IBD, fluids ease the passage of waste through your intestines, causing less pain and fewer complications.  Water is the best option. Try to drink six to eight 8-oz (250-ml) glasses of water daily to maximize your colon health. Avoid beverages that can dehydrate you, like those containing alcohol and caffeine. Caffeine also stimulates the intestines, often worsening symptoms in the process. Carbonated drinks can agitate symptoms by producing gas. Colitis can make it difficult for your intestines to absorb enough nutrients, even if you eat a nutritious diet. A multivitamin might be able to supplement some of the vitamins and minerals your body's missing out on.  While multivitamins might be able to help you supplement missing nutrients, do not rely on multivitamins instead of actual food and drink. Multivitamins do not provide your body with the protein and calories it needs to run. Stress can trigger colitis flare-ups, so you should take lengths to minimize it, though you can't cut it completely out of your life. Stress can make your stomach empty slowly and produce more acid than usual. It can also change the rate at which food passes through the intestines or affect intestinal tissue.  Mild to moderate exercise (jogging, cycling) can quickly and dramatically reduce your stress levels. You could also try yoga, meditation, or other exercises that ask you to focus on your breathing. If none of these options help or seem appealing, you could simply set aside a little time each day to do something you enjoy. That one simple action, in itself, can reduce your stress levels. Look at the side-effects for all your medications (including over-the-counter ones) to see whether they irritate the digestive tract or not.  Avoid any over-the-counter medication that mentions stomach or intestinal irritation. Never stop taking a prescribed medication without first consulting your healthcare provider. Nonsteroidal anti-inflammatory drugs (NSAIDs), in particular, have been known to cause flare-ups of colitis. Probiotics are useful bacteria found naturally in the digestive tract. Getting more of them through yogurt or supplements can replace those lost through colitis, normalizing digestive health. The effectiveness of fish oil is debated — though a known anti-inflammatory, it's not been proven useful for intestinal inflammation. It could also loosen stools, and worsen colitis-induced diarrhea.  Some evidence suggests that aloe vera might help as an anti-inflammatory, but the evidence is weak at best. Like fish oil, it's a known laxative. Acupuncture is used to treat a variety of conditions involving pain and inflammation. Always go to a licensed, rather than amateur, acupuncture specialist when trying this treatment. Turmeric has a compound called curcumin. When used in conjunction with other colitis therapies, some evidence suggests that this compound can improve symptoms.

Summary:
Manage any diarrhea. Avoid problem foods that might cause IBS flare-ups or worsen diarrhea. Eat small meals. Drink enough fluids. Ask your doctor about multivitamin use. Reduce your stress. Avoid medications that could cause flare-ups. Try alternative treatments.