Hi doctor, I am trying to understand my dad's condition who is having hives, itching and angioedema from last three months. We got the blood allergy test done and which showed his is allergic to dust, coackroach and capsicum. We also got a patch test done that was negative. He has been put on Allegra and oxepic. He is diabetic (
hba1c 8.1) and hypertension patient. We also got ANA done which was negative. During these episodes he IGE levels are raised. What else I should do to find the cause. Dermatologist have no answers