I need cetrizine

I had Mee Jawa with a frap for dinner just now... I think it was not too long before I felt an itch on my left thigh. Eczema.

I am still rather clueless what causes it... or rather what causes mine. I have eaten those before at the same place and had not encounter any problems. Although, it must be said that the Mee Jawa is a bit different than how I remember it last tasted.

It has been years since I last experience this itching itchies and scratchies. I had thought that I somehow had outgrown it, or my memory cells are brilliant enough already from past battles, if that is even possible. At the beginning, I thought it was just a dirt rash as I was out for the whole day, approximately more than 15 hours. So, it did not cross my mind that there was anything I should be concern about it.

WARNING - Science Content!
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Prawns, my allergen, my kryptonite. Too much of it and my immune system will go crazy. Firstly my bone marrow will form B cells which is activated in the presence of prawns. More and more antibodies type lgE will be secreted, which will trigger histamine (heparin etc) release from mast cells.
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And so, to make it short, I now have bumpy, red, itchy spots over my body. I only hope my macrophages @ phagocytes @ pacman v2.0 are doing a good job.

Perhaps this video, besides being entertaining can share how our immune system works.