Thanks for your query
Your doctor is moving in a right protocol. You need not to be worried at all.
First line of treatment is to prescribe antibiotic empirically along with routine blood investigations, as it is done by your doctor.
Also we should go for ultrasound
of parotid glands and it shows abscess
in your case. so, your doctor prescribed injections of antibiotics and anti inflammatory as injections are more effective.
If it doesn't resolve then definitive treatment is taking the whole material out through incision and prescribing proper antibiotics with pus culture sensitivity report.
Hope I have answered your question.