Hello! Welcome to Healthcaremagic. I read your query. Since you got all 4 wisdom teeth extracted and having parasthesia, your symptoms correlate with Trigeminal nerve injury. A minor prick during injection can also lead to this. Mostly the symptoms are short lived ranging from few days to weeks. I suggest you to avoid taking too hot or cold things to avoid tongue injury because of loss of sensation. Take Multivitamins for 7 days if your Dentist did not prescribe already. In case the symptoms persists for more than a week, Please consult an Oral surgeon for further treatment. Hope this answer helps. Thank you.