Hi,Welcome with your query to HCM virtual Clinic.
I reviewed all the details of your query,in context of the soft lump in left neck above collar bone.
Based on the facts of your query,You seem to have Boil,as it developed overnight with a soft lump above collar bone with a pinpoint chilly like sensation in the middle,which implies boil with pointing head in middle.
The cause of worry is because this lump is not settling down
These lumps could be due infective URTI / or could be
Cold abscess,due to TB
adenitis.
To rule out these possibilities you need to get the Complete blood test/ESR/Interferron Gamma-release assay(IGRA) for latent TB infection.Possibility of NHL/ HL lymphom needs to be ruled out by CT and Excision
biopsy with Histopath studies by a Surgeon/ENT Surgeon,as the and FNAC Biopsy of this neck lymph nodes has come inconclusive.
Hope this reply would help you to plan treatment with your doctors and resolve your worries.
Will appreciate writing excellent review comments to help the needy patient visitors like you at HCM.
Welcome any further query and information in this regard.
Good Day!!
Dr.Savaskar M.N.
M.S.Genl-CVTS