Stinging insects, Aeroallergens (uncommon), Foods
and additives like
Milk, egg, peanuts, nuts, soy,
and wheat are the most common agents to cause generalized urticaria in adults.
This triggering factor should be identified and should be avoided. A skin allergy test can be useful.
Treatment includes anti histaminic and glucocorticoids against prescription. Other causes needed to be ruled out are purpura, chigger bites, atopic dermatitis, generalized infection etc.