What cause mouth ulcers?
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Mouth ulcers are caused by many disorders. These include canker sores, leukoplakia, gingivostomatitis, oral cancer, oral lichen planus, oral thrush, herpes simplex, and other disorders. The skin lesion of histoplasmosis may also appear as a mouth ulcer.
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If you mena peptic (stomach) ulcers, then the above answers are interesting.  For centuries, we thought that acid causes ulcers.  Something seemed wrong with that hypothesis, though, since the stomach is MEANT to have the acid, so why would it cause ulcers? Well in the early 1980's two pretty brave Australian doctors thought of a radical idea: the ulcers are caused by bacteria.  They spent their life proving it and they finally succeeded.  THey actually swallowd the bacteria and have gotten ulcers on purpose.  It all paid off, though, as they have become recipients of the 2005 Nobel Prize in Medicine.  So the second poster is right.  It is bacteria and it is called Helicobacter pylori.  Plenty of people have it and stress, smoking and alcohol make the likelihood of getting an ulcer worst.  If you have ulcers, ask your doctor to check you for H. pylori and treat you as necessary.  Cheers.\n\nCheck this out:\n\nhttp://nobelprize.org/medicine/laureates/2005/
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Because alcohol is a very damaging substance to human body tissue in general. When you have a stomach ulcer, the lining of your stomach is aready dammaged and the alcohol will likley cause further distuction at the site of the ulcer.  This can lead to grave concequences including perferation, bleeding and even death.
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Your problem may be with your stomach.  Do you get heartburn or sour stomach?  Do you have diabetes?  You may have acid reflux disease, or you might be burning fat and be acidotic.  If brushing and flossing don't work, talk to your doctor.  I don't recommend using mouthwash, as that can damage the inside of your mouth and cause further mouth odor.
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It may be from the acid in the tomatoes. I used to get canker sores [mouth ulcers] from eating them. It was caused from my body overreacting to the added acid. I changed my diet to a less acidy intake, and can now eat them.
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For most cases of ulcer the helicobacterium is responsible for the ailment.\na dose of antibiotics for some time may cure it.\nSee your physician.\nYou can be tested with some saliva speciment for the presence of helicobacterium
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Seaweed! (otherwise known as brown algae, a sort of protist.)\nAlso, some chemicals derived by paramecium (I think)\nare in medicine pills that are diagnosed for ulcer problems.
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Many stomach ulcers are considered to be caused by a bacteria, H. pylori, and are often treated using both oral and injected antibiotics to irradicate the bacteria which reside on the surface and within the stomach lining.  Competent medical doctors (specialists?) can determine the cause of an ulcer and its proper treatment.  It is not wise to wait too long because the disease can progress.  Good luck.
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Go to your doc asap.  In the last few years, they have found that ulcers are created by a bacteria called Helicobacter pylori.  Doctors are now treating them with anti-biotics.  Your doc should be able to get you a prescription for one that will help the ulcer sores heal.  Then just watch your diet for awhile.  Eat bland foods that don't stir up stomach acid; avoid stress, etc.  I know all of this from personal experience.
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Do you lick your lips while outside? Do you breath with your mouth open when you are in an area that is cold? Both of these could be causing your problem.\n\nCauses\nAngular cheilitis is most often caused by an infection—usually fungal, but it also can be viral or bacterial in origin. Other possible causes include a vitamin B deficiency, the over-closure of the mouth by someone without teeth, licking of the lips, thumb-sucking, and lip biting.\n\nLess severe cases occur when it is quite cold (such as in the winter time), and mostly happen to young children/teenagers. The child licks their lips in an attempt to provide a temporary moment of relief, worsening the condition.
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There are different "types" of canker sores but, in general, that term refers to a type of ulcer called "aphthous ulcers."  These ulcers are occur on the inside of lips, tongue, and throat (soft tissues in the mouth).  It is unclear exactly what causes them, but some believe them to be a result of Coxsackie virus, a relatively harmless virus known for causing colds.  In addition, it is believed that trauma to the mouth, including from regular brushing and irritation from certain components in most toothpastes (sodium lauryl sulfate, in particular).  Start using a toothpaste without sodium lauryl sulfate in it (such as Rembrandt Canker Sore).  Your physician can also prescribe certain mouthwashes ("magic mouthwash") with certain ingredients in it such as lidocaine, triamcinolone, and diphenhydramine which can make them more comfortable until they clear.
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For recurrent stomatitis  the cause is  unknown.  Positive family history in about 1/3.  Evidence supporting genetic basis. Other causes are stress, local trauma, food allergy, and in association with menstrual cycle.   In children in association with fever and pharyngitis.  In cyclical Neutropenia, HIV Infection.   Crops of ulcers  follow periods of emotional stress. Treatment. 1) Local: a)Alkaline mouth wash and local use of analgesic lozenges.b) Topical steroids. c) Topical antibiotic. d) Deglycyrrhizinated liquorice mouth wash 2) Systemic: a) steroids by mouth. Progesterone therapy. c) Tranquilisers.
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Smoking does increase the risk of stomach ulcers and you should not smoke anyway.  We should make a pact to quit.
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Make sure that your oral care products (toothpaste, mouthwash, etc) do not contain sodium laurel sulfate.  This is a mild detergent that can aggravate canker sores.  Take a B-vitamin supplement, and try an OTC topical oral analgesic with benzocaine and tannin or tannic acid. Benzocaine will numb the pain and the tannin will coat the ulcer, allowing it to heal faster.
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Yes it does, because your body thinks that you are eating and it creates acids to digest the food. But, if there is no food there and you are only chewing gum the acid burns through your stomach creating ulcers.
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inside the mouth such sores are called canker sores and are usually related to some sort of injury to the mucous membranes.  Rinse with antibacterial mouth wash twice daily and it will resolve on it's own.
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Often times, when people see me drinking a cup of coffee -- they give the warning "You shouldn't drink coffee, it will give you ulcers." The thinking, until recently, was that excess stomach acid caused ulcers and that coffee would contribute to the stomach acid. Recent studies however show that most ulcers are caused by a particular bacteria, namely Helicobacter pylori . Those ulcers can be cured easily with antibiotics. An important distinction to make is that while coffee or spicy foods for that matter don't cause the ulcers, they may serve to aggravate existing ulcers.