What causes a burning sensation on left side of tongue due to having top n bottom left wisdoms out 2wks.ive been feeling burning in my mouth 5 days?

Careful: Correlation isn't the same as causation. Burning mouth sensations are caused by several possible factors including allergies, hormonal diseases, medications, nutritional deficiencies, and acid reflux as well as infection. It may have nothing to do with your recent extractions or it may be a complication of that procedure. Go back to the extracting dentist for an evaluation.

Re-evaluation: Have the extracting dentist/oral surgeon examine the wounds. It may or may not be associated with the extractions.

Lingual Nerve Injury: is a common complication following wisdom tooth extraction. Your oral surgeon/dentist may consider high-dose corticosteroids to reduce immune inflammatory reaction or NMDA antagonist (ketamine) also may be beneficial.