Fish oil is an oil extracted from fish, mainly containing vitamin A and vitamin D, which has the effect of protecting the retina and promoting calcium absorption.1. Fish belongs to the seafood category and is easily allergic. If dizziness occurs from eating fish oil, an allergic reaction cannot be ruled out, so you need to stop using it immediately and pay attention to bed rest, and a rash needs to be seen in the hospital and treated with anti-allergy. In addition to allergic reactions, there are more causes of dizziness, such as cerebral blood supply deficiency, hypertension, anemia, etc. You can further go to the hospital to perform blood glucose, blood lipid, transcranial Doppler examination, routine blood tests, and monitor blood pressure, according to the results of symptomatic treatment. 2, fish oil is a health product, many other components of health products are not known, and side effects are not clear, try not to take it on their own. If there is discomfort, you need to go to the hospital to consult a doctor and choose the drug under the guidance of a doctor to avoid adverse reactions.