Thank you for your question.
I am Dr Saha, I shall try my best to help you.
Redness of the face can come from different causes.
It is unlikely to be related to acid vomiting.
If sunburn is excluded there can be hypersensitivity reaction.
Lupus can cause redness in those areas.
Some infections, carcinoid syndrome can be associated with such redness.
Seborrheic dermatitis can cause it.
I would suggest to take an examination by a dermatologist.
I hope this information helps.
If there’s anything else I can do, please let me know.
If you are satisfied, please rate my answer as good or excellent.