The left side of my face swells up and I get ulcers in lips, mouth, palate. There is selling of gums on the left side and chewing food becomes very difficult. I suffer from acute pain in my swollen gums and also my nose gets blocked. There is a burning sensation in my lips. Can this be oral allergy syndrome? Its very painful. I am having problems in identifying the cause. Having cheese popcorn and puffed rice mixed with mustard oil, raw onion and green chilly has made my condition very serious. Cetzine tabs are also not giving much relief. What should I do?