To define Angioedema, other signs than skin swelling is important to consider. Keep in mind that the symptoms may show up all of a sudden; it is difficult to predict them. The swelling and other characteristics usually last for up to three days. Sometimes, the patients start feeling hot because of the damaged areas. Feeling faint, dizzy, experiencing problems with breath, allergies, and abdominal cramping are all signs of Angioedema.