Since when is the swelling?
Do you have pain, soreness?
This is termed as upper respiratory tract infection. This is likely to be viral infection. Following measures should help you;
1) Warm salt water (saline) gargles; three times a day
2) Motrin / Advil / Aleve
3) Avoiding drinking or eating cold things like ice-cream
If this persist for more than 4-5 days, you may need a swab test by your physician.
Please feel free for your follow up questions.
Swab test or a culture test is to identify the bacterial organisms. Sometimes the upper respiratory tract infections are not viral and thus would not subside spontaneously. Swab test identify the bacteria and tell about the best efficacious antibiotic against them.
It is privilege assisting you.
Usually an antibiotic is given, if this does not resolve spontaneously in 3-4 days. Steroid shot is usually not necessary.