Its good that you are concerned about your health and you are taking every precautions about not to get infection. Here are certain tips for the burnt mouth and gums:
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Stay away from citrus fruits and dairy products for 3 to 4 days

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Avoid carbonated beverages like cold drinks and sodas etc.
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Chamomile tea is beneficial but drink only after cooling.
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Suck on ice and eat puddins, ice creams etc.
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You need to be extra precautious while brushing. First thing is to change it to soft bristles tooth brush and don't scrap the soft oral parts.
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Do saline warm water gargles four times daily. This acts as an antiseptic thereby accelerating the healing process.
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