hello and welcome to HCM,
By reading through your problems it seems like an infected lymph
node or an infected soft tissue
swelling which is common in that area.
But any mass or swelling has to be properly examined by the ENT and only then we can be perfectly sure that you are fine.
So consult an ENT, ask for a proper examination and maybe request for a FNAC or biopsy
to confirm the diagnosis
Also start a course of antibiotics and anti inflammatory medications in consultation with your doctor to control your pain and swelling.
take care and get well soon
Dr Sriram Nathan
ps: even scalp
lesions can cause the nodes to be enlarged like this which can be confirmed by the ENT