Birch mushrooms allergy symptoms may be itchy skin, redness, swelling, and in severe cases, breathing difficulties and other symptoms. 1. Itchy skin: people who are allergic to birch mushrooms will have itchy skin soon after eating birch mushrooms, and the itchy skin on the limbs, whole body and face will be so strong that they will always scratch with their hands unconsciously. 2. Skin redness and swelling: birch mushrooms allergic people in the skin itching with the hand to scratch, began to a grain of red rash, or a piece of red mass, delayed dissipation, the skin becomes red and swollen. 3. Difficulty in breathing: Birch mushrooms allergy began to appear itching, redness and swelling of the skin and other symptoms, no timely treatment or continue to eat birch mushrooms, allergy symptoms will be further aggravated, the throat due to allergy edema is very strong, easy to have difficulty in breathing symptoms, severe cases there is the danger of anaphylactic shock. After eating birch mushrooms found allergic symptoms, need to go to the regular hospital in a timely manner.