Brief Answer:
Multiple causes

Detailed Answer:
Thank you for asking

I read your question and i understand your concern. White tongue is a coating of debris, bacteria and dead cells on your tongue that makes it look white. Although the appearance of white tongue may be alarming, the condition is usually harmless and temporary and is likely correlated with your recent molar extraction secondary to infection as oral cavity infection likely leads to such presentation of tongue.

Poor oral hygiene, dry mouth, dehydration, oral thrush, candidiasis, smoking or other tobacco use, mouth breathing. low roughage diet eating mostly soft and mashed foods and lichen planus etc are some of the commonest causes of white tongue.

You need to get to an oral hygienist and let them have a look what it is. What ever it turns up to be, it will be benign and easily manageable.

I hope it helps. Take good care of yourself and don't forget to close the discussion please.

Regards
Khan

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