I am due a tonsillectomy soon what's the best after care advice , i.e only eat certain foods, reducing swelling,reducing infection etc?

Cold liquids at 1st: Expect to use your pain medication - it helps. Ice cold liquids at 1st - slowly add ice cold Ensure. After about a week the cold may hurt the new tissue, so tepid clear broth, etc. No acidic, spicy or textured for awhile. Antisceptic gargle and saline gargle. be patient. Rest, Don't talk - not even silently in your head if possible. It should be a lot better after 2 weeks. Prepare lots of support.