Hello Usually this sort of complications are rare and occurs if the needle which was injected to produce anaesthesia causes injury to the nerve involved. It cannot be trigeminal neuralgia or sinusitis. Injury to a nerve takes very long time to heal and some times can even be permanent but usually resloves within a year. It helps if you take vitamin b complex along with a pain killer tablet like aceclofenac. Apply warm cloth near the area from outside. 1. Along with it i need to know if the wisdom tooth was extracted in tge lower jaw or upper? 2. Has the extracted site completely healed? 3. Does the tightness of gums he is feeling only in that particular area. 4. If possible a photo of that area would be helpful or an image of previous xray. It is needed to rule out some other causes too. Thank you.