Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your health concerns. ..
As per your complain two main structure present below the jaw are :
1.Submandibular
Salivary Gland..
2.Submandibular group of lymph nodes..
Any disorders related to any one or both of these structures can lead to pain below the jaw..
In case of Submandibular SALIVA gland there can be infection or clogged duct or the gland by some foreign body or stones can lead to pain..
In case of lymph nodes infections in the head and neck region can cause inflammation in lymph nodes leading to pain and discomfort..
LYMPHOMA is a malignant condition of lymph nodes which can cause pain..
You should consult an Oral Physician and get evaluated so that he can evaluate you clinically and do proper diagnosis and treatment can be planned accordingly..
Hope this information helps..
Thanks and regards..
Dr.Honey Nandwani Arora..