Brief Answer: It can be acid burns. Detailed Answer: Hello, Welcome to health care magic Grape fruit extract is a common home remedy used for treatment of mouth ulcers and as antispetic mouth wash. However since it is acidic in nature when used in full strength it is known to cause burns of the oral cavity. Burns of the oral cavity do heal quickly within 1-3 days because of rich blood supply.The general guidelines for treatment of burns of oral cavity are First wash the mouth by normal water to remove the offending agent. For pain relief you can gargle or wash the area by cold water to get pain relief. Use of antibiotic gels to prevent secondary infection Use of Lignocaine gels for pain relief. If the burns of deeper degree it needs consultation by a dentist or oral cavity surgeon for treatment. Hope I have answered your query. Thank you

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