Eating fennel is contraindicated for: Yin deficiency fire (Yin essence deficiency in the body, the emergence of hyperactive fire) people should be cautious, its allergies are contraindicated to eat, and so on. 1. Yin deficiency and exuberant: fennel is warm and dry, can move qi and stomach, applicable to the spleen and stomach cold (spleen and stomach weakness and cold). Fennel will aggravate the symptoms of yin injury if it is used for people with yin deficiency and fire exuberance. Symptoms of yin deficiency and exuberant fire include dry mouth and thirst, fever, dry stools, dysuria (unsmooth urination) and yellowish red urine. 2. Prohibited for those who are allergic to it: For those who are allergic to it, the use of fennel may lead to allergic phenomena. Its use as a medicine should be under the supervision of a doctor.