Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concern..
As per your complain swollen knot under the chin that is painful and swollen face on the same side can be due to causes like:
1.Any deeply decayed tooth causing swelling, pain.
Lymph node enlargement..
2.Swelling in the submandibular
salivary gland due to infection or obstruction in its duct by stones or foreign body..
But confirmation can be made to after a clinical examination and investigations like
x ray..
In case of tooth related swelling treatment of tooth followed by antibiotics and painkillers can help..
In case of salivary gland disorder treatment will depend on cause..
As for now take anti-inflammatory painkillers like
Ibuprofen and do cool compresses over swelling..
Take
soft diet..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.