Eating cucumber after the mouth numbness symptoms, may be related to the composition of the cucumber; may also be allergic to cucumbers or pesticide residues caused by stimulation. 1. Related to the composition of the cucumber: fresh cucumbers contain alkaloids, if you eat too much cucumber, the mouth can appear astringent numbness of the symptom, generally can be relieved by themselves. 2. Allergy to cucumber: If the symptoms of numbness of the mouth, accompanied by rashes, itching and other discomforts, may be caused by allergy to cucumber, can be taken orally anti-allergy medication, such as loratadine tablets, cetirizine tablets and so on. 3. Pesticide residue stimulation: eating cucumbers, not clean, the symptoms of numbness in the mouth, the symptoms further aggravated, may be caused by the stimulation of pesticides, it is recommended to go to the hospital as soon as possible, so as not to delay the condition. Eating cucumbers after the symptoms of numbness of the mouth, may be a normal phenomenon, there may be pathological reasons, according to the patient’s accompanying symptoms, targeted treatment.