而另一种引发的原因便是维生素B缺乏症，嘴角开裂的同时伴随有口疮舌疮的情况。

Another possibility (although this is far less common) is a vitamin B deficiency, if the cracks are accompanied by a sore tongue.

youdao

我听说秦王有病，让医生治病，实行论功行赏：吸脓吃疮的，可得马车一乘：舌舐痔疮的，可得车马五乘。

I heard that the King of Qin was ill. He let the physicians: those who sucked pus and ate sores would get I horse-drawn chariot; those who licked the piles would get 5 chariots.

youdao

我听说秦王有病，让医生治病，实行论功行赏：吸脓吃疮的，可得马车一乘：舌舐痔疮的，可得车马五乘。

I heard that the King of Qin was ill. He let the physicians: those who sucked pus and ate sores would get I horse-drawn chariot; those who licked the piles would get 5 chariots.

youdao