Hi..
Thanks for the query..
As per your complain it seems that due to
post nasal drip there has been infection in the throat leading to
sore throat and sore mouth and blisters are due to APTHOUS STOMATITIS..
Sore throat can be bacterial or viral in nature while there can be viral infection with secondary bacterial infection.
You can take
Azithromycin 500mg once daily for 5 days, do warm saline gargles, do
chlorhexidine gargles, take throat lozenges, chewable vitamin c lozenges should be taken.
Steam inhalations can help..
Use a cool mist humidifier..
For sore mouth so cold water gargles,suck on ice pops, take a
multivitamin tablet once a day for 15 days, avoid spicy and hot food to prevent irritation..
Apply a steroid based oral paste to reduce inflammation and a numbing gel like lignocaine gel to reduce pain as it will numb the are on which it is applied..
Hope this helps..
Regards..