People undergoing chemotherapy can eat sea cucumber, but they need to consume it in moderation and not excessively. Sea cucumber is rich in nutrients and contains trace elements. If you are not allergic to sea cucumber during chemotherapy, consuming sea cucumber can replenish the nutrients needed by your body, which is conducive to the recovery of your condition. However, if there are obvious symptoms of vomiting or nausea when consuming sea cucumber during chemotherapy, you should avoid eating stimulating and seafood foods. You can consume more fresh fruits and vegetables to ensure the balance of nutrients in the body, as well as replenish the body’s water, promote the body’s metabolism, and exercise appropriately, which are all conducive to the recovery of the disease. When adverse reactions occur during chemotherapy, you should inform your doctor in time for examination and diagnosis, clarify the cause of the disease, and carry out standardized treatments under the guidance of professional physicians in combination with your own situation to avoid the impact on your body.