内层表面形成小的开放性疮口(溃疡)，会发生出血并产生脓液和粘液。
Tiny open sores, or ulcers, form on the surface of the lining, where they bleed and produce pus and mucus.
口腔癌的最初症状通常是在口腔内出现一小块白色或红色的斑点，可是，在疮口出现以前这种病是能检测出的。
The first sign of oral cancer is often a tiny white or red spot in the mouth, but the disease can be detected before a sore appears.
口腔癌的最初症状通常是在口腔内出现一小块白色或红色的斑点，可是，在疮口出现以前这种病是能检测出的。
The first sign of oral cancer is often a tiny white or red spot in the mouth, but the disease can be detected before a sore appears.
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