You may be having acute urticaria
There may be some cause.
And the cause may be some irritant,dust,soap,grass,food,drugs..etc
Or there may be some internal cause..infection or systemic disease
Thorough history may be taken by expert.
You consult dermatologist
If needed blood may be tested to find out some internal cause.
Antihistaminics may alleviate the symptoms.
If severity is there, steroids
may be taken under supervision.
And the cause should be removed..
I hope you got my answer.
Dr. Ilyas Patel MD