Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns..
As per your complain a small moveable lump under the jawline is a swollen lymph node and it is commonly due to Infection in the regions drained by those group of lymph nodes..
For the lymph nodes under the jaw line which is sub-mandibular group of lymph nodes, the
lymphadenopathy can be due to infection in the head and neck region like teeth and gums, ear,throat, infections in mouth, nose etc..
At times infections in distant regions cause swelling and infection in distant lymph nodes..
You should consult a physician and get evaluated and in case of infection antibiotic course can resolve the swelling..
In case the swelling does not subside even after treatment or in case if there is no pathology found in any part of body a
Biopsy has to be done to rule out for any malignant condition sprouting in the lymph node known as
LYMPHOMA..
Hope this information helps..
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Thanks and regards..
Dr.Honey Nandwani Arora..