My doctor said that I shouldn’t fast today (Taanis Esther), can I still say Aveinu Malkeinu?
Yes you can still say Aveinu Malkeinu, because it is a tefilla. However you would not say aneinu in Shemona Esrei. Additionally even though yo aren’t fasting, you should only wat foods that are healthy and that you need, but not treats etc.
Have a happy Purim