What Causes Red Swollen Rashes On Cheeks?

Hi my wife is 35 years old and she was getting some red swollen on her cheeks and adjacent to her nose and mouth which slowly started to appear on her arms. On a doctor's advice we took an allergy test and we came to know that she's allergy with many food like rice, corns, roots( Potato, beetroot,etc), milk, and many others. She's a vegetarian. I want to know where in india or chennai we can get a good treatment for this.