Tight and burning of chest

Patient: I was eating a half-raw prawn the other day. After eating it, i felt tightness in my chest and also a burning sensation followed after. I also had itchness in my throat and the whole duration lasted for about 30 minutes. I never had such a situation after eating cooked prawns other than just itchness on my lips. What is happening?

Symptoms: Chest tightness, burning sensation on chest, itchness in throat

Doctor: