Thanks for asking the query,
According to your symptoms i suppose that you have developed a pus accumulation at the extraction site, this can be due to food accumulation or any left over root particle which is causing infection.
To rule out this you need to visit the Dentist
get the checkup done take necessary x-rays, any left over tooth particle can be removed with the help of surgical extraction.
Start with the course of antibiotics and analgesics.
Take lukewarm saline and antiseptic mouthwash rinses.
Hope this helps out.