My son has used Listerine mouthwash for some time.  Recently, after using it, his tongue went numb.  He needed to have his wisdom teeth pulled & thought it might be from that.  The oral surgeon just pulled his wisdom teeth & said the nerve to the tongue is not associated with the nerve to the wisdom teeth.  They are putting him on a steroid.  They said Listerine may have caused it.  Is that possible?
Hello, Read your query, as your son had undergone wisdom tooth extraction this paresthesia of tongue can be due to lingual nerve injury during anesthesia given, or it can be due to use of mouthwash also don't be worried so much you should consult dentist and discuss taking medication like one tablet Erosion for numbness, discontinue your mouthwash. Do warm saline gargle two - three times a day, take proper nutritious healthy diet, green leafy vegetables, take proper sleep of 8 hours. Hope it will help you. If you have further queried I will be happy to help. Wishing him good health.