Delayed Pressure Urticaria

Hi, I've had DPU for about 10 yrs.last couple of years it's gotta more severe..Does anyone know the under lining reason DPU first starts? I also get the Angioedema so bad in hands & feet..Also I've been to Rheumatologist, now waiting to see an Immunologist ..Is this the right doctor to be seeing next ?

Also wanted to ask, being my immune system is acting my body & in over drive..in future will it attack more than just my skin & swelling of my joints? Worried it will attack my organs..

Oops attacking my body...sorry lil typo...

My Allergist in 2013 said I have Severe Delayed Pressure Urticaria , now will I have this for Life..any hope of it going away ? First hoping for right Doctor to get me on a Good Treatment Plan to help ease my discomfort..