I ate prawns last night. After one hour I observed some rash with bumps of skin with slight itching sensation on my shoulders, chest and back. I thought may be due to any mosquito bites first. But even after observing the same symptoms in morning, I thought may be due to some allergy. My stomach is also feeling uncomfortable since the food was not digested so far (as I feeling. Suggest cure. Shall I leave or apply/take any medicine.