Consult dentist ...for temporary relief u can tk ketorola dt 10 mg n antibiotic ,warm water gargle, tk mouthwash like rexidine .2%

Yes it may be pericoronitis(swelling of gums around wisdom tooth because of infection due to food accumulation) Warm salt water gargle 3-4 times a day will help u, Tab.flexon MR (s-o-s) Visit the dentist Get the intraoral x-ray done If the problem is frequent then better get it extracted.

Medications will only provide temporary symptomatic relief and will not cure this problem and the symptoms are definitely bound to reappear again after sometime. A proper case evaluation and an x-ray will be required to access the clinical condition of the tooth and it is most likely that extraction will be the only recommended treatment option for permanent relief. Your current symptoms point to the fact that the infection is not confined to that area only and has involved the bone and the muscles leading to restricted mouth opening or trismus. Regards.

U have to take a muscle relaxant and u have to do warm saline rinses. Also, visit a dentist for your X-ray and evaluation