Sometimes, my throat tends to collapse actually, and i am really afraid about the picture.

I have allergy in prawn but more important is that when i lean towards my plate during lunch or having some food, if the spicy liquid touches the deep upper skin surface of my throat, then an inflation starts with coughing. A formidable itching starts. If i continue to cough, it continues to collapsing. I must have to suppress it by anyway. Hot water comes to use but slowly. My breathe narrows and starts making a whistle type sound. I know if it continues, then i will see the end. After the incident, if i see in the mirror, i see speck inside the throat. But vanishes after an hour.

The doctor couldn't identify the problem.

If you can guess, please share me.