hi and welcome,
Appearence of red bumps, lesions on the oral mucosa or surronding the lips is seen due to several reasons ;
It can be a allergic reaction
to certain food stuffs , deficiency or vitamins especially vitamin B 12 and vitamin C may lead to oral lesions.
Habits like tobacco chewing
,smoking and alcohol consumption may also lead to oral inflammation
and lesions spreading extra orally.
Viral infections like herpes also leads to dry and patchy skin around oral cavity.
Blood disorders like anemia and allergies needs to be evaluated.
Exact diagnosis can be made only after clinical examination and pathological tests .
i would suggest you to consult and oral surgeon and get the evaluation done.
Meantime avoid tobacco chewing and other habits if any .
start with a multivitamin
supplement course for 7 to 10days and maintain good oral hygiene
to prevent infection.
i hope this helps ,