Yes, many times. Once I walked into my allergist without an appointment because I could not stand it one more second. They saw me immediately and shot me full of steroids. No answer as to what causes it, though if I forget to pace myself and overdue then it will return. It seems to coincide with lupus/allergy flares.
I feel for you and hope you get some relief.
Take care, Fran
Dx: Lupus, sjogren's, celiac, severe allergies, asthma, GERD
Daily Meds: Plaquenil, Zyrtec, Nasacort, Prozac, Ambien CR, CellCept, Zantac, Bactrim, Q-Var, Restasis, Albuterol
Daily Supplements: Calcium, B-100 Complex, Vitamin D, Daily Vitamins.
As Needed Meds: Epinephrine, Benadryl, Proventil, Tylenal, Vicodin, Prednisone.