HELLO..Thanks for sharing your concern with us.
I feel you are suffering from Uricatia.It is common condition with frequent exacerbations and remissions.In most cases,a direct cause is not identified.Stress
is one of the factors which might precipitate an episode of urticaria
.A combination of correct anti histaminic tablets for a few months help in reducing the severity and frequency of these hives
Start application of a soothing anti pruritic calamine
lotion to relieve the itch.In certain cases a few bood tests are advised to rule out ant internal causation of the same.
hope this helps!take care...