Skin thumb|upright=1.3|Urticaria and flushing on the chest of a person with anaphylaxis Symptoms typically include generalized hives, itchiness, flushing, or swelling (angioedema) of the affected tissues. Those with angioedema may describe a burning sensation of the skin rather than itchiness. Swelling of the tongue or throat occurs in up to about 20% of cases. Other features may include a runny nose and swelling of the conjunctiva. The skin may also be blue tinged because of lack of oxygen.
Skin thumb|upright=13|Urticaria and flushing on the chest of a person with anaphylaxis Symptoms typically include generalized hives itchiness flushing or swelling (angioedema) of the affected tissues Those with angioedema may describe a burning sensation of the skin rather than itchiness Swelling of the tongue or throat occurs in up to about 20% of cases Other features may include a runny nose and swelling of the conjunctiva The skin may also be blue tinged because of lack of oxygen