| 单词 | mouth ulcers |
| 释义 | mouth ulcersmouth ulcersPainful white, grey or yellow open sores occurring anywhere on the inside of the lip or cheek or on the floor of the mouth. Most are of unknown cause, are harmless and soon resolve. Ulcers that do not disappear in a few days may be dangerous and should be reported. Also known as aphthous ulcers or canker sores. |
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