The numbness of feet of stomach cancer patients after taking chemotherapeutic drugs after surgery may be caused by the side effects of chemotherapeutic drugs, or it may be caused by physiological factors. 1. Side effect of drugs: some chemotherapy drugs have obvious neurotoxicity, that is, the drugs and their metabolites directly or indirectly have toxic effects on the nervous system. Commonly used chemotherapeutic drugs for treating gastric cancer, such as oxaliplatin injection, capecitabine tablets, etc., both of which can lead to numbness and sensory abnormalities in limbs. If patients can tolerate it and have no other symptoms, the numbness of feet can be gradually relieved after the end of chemotherapy. 2. Physiological factors: In addition, numbness of feet of stomach cancer patients after taking chemotherapeutic drugs after surgery may also be caused by physiological factors. If the patient is lying in bed for a long time and cannot get down from the bed, it may lead to poor blood circulation in the feet, and the numbness of feet may also occur. If there are no other uncomfortable symptoms, there is no need to worry too much and usually no special treatment is needed. It is recommended that patients with abnormal symptoms should go to the hospital in time to complete the relevant examination to clarify the cause of numbness of the feet and carry out treatment under the guidance of the doctor.