Hi i think it is only acute urticaria
.it may due to food allergens .insect stings and dyes and due to chemicals and due to drugs as i started after antibiotic regimen is stopped andonidtat used earlier without any reaction hence drug s are ruled out.so it can be due to food allergens.
It presents as hives
which are transient all over the bod eith swellings on the dependent parts.it can be cured with atarax
25 mg in the night.alaspan in the morning and application of calamine