Thanks for posting the query,
Lump in the jaw can be because of tooth infection , bacterial infection in the tooth leads to abscess
formation that had spread to the adjoining tissues and jaw bone leading to swelling of the jaw bone .
If not treated in time leads to spread of the infection to the spaces of neck forming space infections , drainage
of abscess is required after extraction of tooth.
Take complete course of antibiotic and analgesic
Use lukewarm saline gargles 3-4 times a day , use antiseptic mouthwash gargles twice daily , maintain a good oral hygiene , avoid eating hot and spicy foods .
Take an OPG x-ray this will give the correct periapical condition of the tooth and the sirrounding tissues .
Hope this helps out.