Welcome to the healthcare magic.
I had gone through your question. I can understand your concern.
You would have have mentioned your age, habits like smoking
, tobacco usage which are risk factors for cancer. The unilateral reddish tonsilar swelling could a peritonsillar abscess
. With that much short duration, its highly unlikely to be cancer.
I recommend the following.
1) A course of antibiotics.
2) Analgesics like tablet paracetamol
3) Salt water gargling. Add a pinch of salt to a glass of warm water.
4) Clinical examination by an ENT doctor/ You can take an image of the swelling and write a detailed history send me on healthcare magic for more help.
Hope I have answered your question.
Wish you a good health.
Dr.Paparaja S MBBS, MS
Consultant ENT Surgeon.