At first keep yourself free from stress and anxiety
Avoid oily ,spicy and food acidic in nature.Which causes pitta imbalance.
Consume light and hygienic homemade food
Have dinner 2 hours before going to bed at night
Add some Katu(bitter) vegetables like bitter gourd in your daily diet which works as blood purifier.
Above are the general suggestions which can reduce the severity of urticaria.And the Ayurvedic medicines are extremely helpful to cure urticaria.
Next Steps
So will advise you to visit an Ayurvedic doctor.
Health Tips
Drink at least 2or3 glasses water just after getting up in the morning.