1, allergic physique: The main components of fennel are volatile oil, fatty oil, glycoside, saponin, triterpenes, etc. If you are allergic to fennel, you may have allergic reactions such as itchy skin and rash after eating fennel.
2, pregnant women: fennel is a hot spice or Chinese medicine. After pregnant women eat fennel, the water in the intestines may be rapidly consumed, and the intestines are dry, which is easy to cause constipation, which is not conducive to the health of pregnant women and the growth and development of the fetus.
3. Fire due to yin deficiency: Fire due to yin deficiency is generally caused by overwork, long illness and old age. The patient's yin is generally weak, and the internal heat is strong, while fennel is warm. If the patient with fire due to yin deficiency takes fennel, the yang in the body is too strong, which may lead to five symptoms such as upset fever and night sweats, and may also aggravate the patient's own symptoms.