Thank you for your query.
I understand your concern.
It must be a local infection of the scalp
for which the lymph gland is swollen.
Apply a local antibiotic
cream to that area and give some oral antibiotics
after consulting a doctor.Give paracetamol
If you have any further queries you are free to consult me.
Hope this answers your query.
Wishing a speedy recovery.
Do not worry we are there to help you out.
Have a nice day.