Hello and welcome to HCM,
is a painful condition usually caused due to dislodgement of blood clot from the extraction socket that will expose the alveolar bone leading to inflammation. it is usually seen 3 to 4 days post extraction. i can suspect dry socket in your case. you can start gargling with lukewarm saline water or antiseptic mouthwashes which will give soothing effect. visit a dentist
and get the condition confirmed,the area needs to be flushed with betadine
followed by antiseptic dressing of zinc oxide
eugenol. this pack need to be replaced every 2 days till the symptoms subside. take care.