hi and welcome ,
is a painful condition of jaw seen due to dislodgement of blood clot from extraction socket which exposes the alveolar bone to the oral environment leading to infection.
The condition usually develops 2 to 3 days post extraction and presents with pain, discomfort ,difficulty in opening mouth and sometimes fowl mouth odour due to infection.
To prevent this ,i suggest you to maintain good oral hygine by keeping the area clean.
Use lukewarm saline water or antiseptic mouthwash like chlorhexidine
for mouth rinsing .
do no hurt the area or apply tooth brush over it .
If you still find the symptoms of dry socket ,to need to visit a dentist
and get the area packed with zinc oxide
eugenol dressing which is replaced every 2 or 3 days till symptoms sub side.