Sir my tongue infection & test is changing which...

How to treat oral cavity infection ?
1. consult an internal medicine doctor to do the needed medical examnation and determine the treatment pathway
2. stop smoking and avoid alcohol and dusty weather
3. drink plenty of water and vitamin C drinks and honey 
4. drink herbs that usually helps with thraot pain and infection such as cinnamon and honey nd genger
5. take medication to relieve throat pain such as ivy syrup
4. take antibiotics such as amoxicillin  ( 2 pills /daily ) for one week
7. in case of serious oral cavity infections , doctor may prescribe more heavy antibiotics such as clindamycin or doxycilin  
8. if your codition lasts  or new symptoms appeared , doctor may need to do advanced examnation to determine the cause and treatment pathway
about change in taste :
its possible side effect or complication , and usually its get better after some days , you dont have to treat it specially