Hello and thanks for writing in
The enlarged lymph
nodes can be due any infection (bacterial or fungal or viral), Malignancy or due to inflammation. As the size is increasing and causing pain to you, you need to consult your GP as soon as possible.
The treatment depends upon the cause of the bump. A simple test FNAC (Fine needle aspiration cytology) help you find out the cause and accordingly treatment can be planned.
Feel free to consult your doctor and get well soon.