No side effects. Patients with gastrointestinal colds and acute enteritis can not eat, may aggravate the symptoms of diarrhea. Rich in high purine and high uric acid, gout patients should not eat, will increase the body's uric acid content and thus lead to gout attacks. Patients with itchy skin should also not eat birch mushrooms, otherwise it may cause it to develop into persistent itching. In addition pregnant women, lactating women and patients with hypoglycemia, it is not recommended to eat birch mushrooms.