You had a bad mouth hygiene and infection recently and got treated for that. Poor oral hygiene
, ill fitting dentures, smoking
, reverse smoking, chewing tobacco/betelnut all are contributory factors for poor oral hygiene and halitosis-bad breath; And risk factors for Oral cavity cancers.
Carcinomas of oronasopharyngeal regions are the commonest carcinomas in third world countries and cause is chronic irritation or exposure to tobacco.
Leukoplakia- White patces of thickened mucosa in oral cavity and
Erythroplakia- Reddish discoloration of oral mucosa
both are well known pre-cancerous conditions and if left unmanaged will portend a very poor
ultimate outcome by getting converted into aggressive forms of carcinomas.
So consult an ENT/Head neck surgeon as soo as possible and get the lesions examined and prefrably biopsy
and HPR so to manage it before they become malignant.
All the good health.