Hello and welcome to HCM.
Thank you for your query.
Although a sudden onset does indicate a hypersensitivity
reaction, we will have to rule out an infection as well. A hypersensitivity reaction can be treated with anti-histamine
medications, and will give you rapid relief.
I understand your symptoms are limiting and exhaustive, thus I recommend you visit a doctor to get yourself examined and rule out/diagnose an infection. Treatment for both conditions is easy and provides quick relief.
I hope I have succeeded in providing the information you were looking for. Please feel free to write back to me for any further clarifications. I would gladly help you.