The following factors should be considered after eating: 1, cervical spondylosis, keep your head down when eating, especially simple cervical spondylosis causes pain in the posterior occipital area, you can perform cervical spine MRI to understand the situation, usually pay attention not to lower your head for a long time, you can do cervical spine exercises, if necessary, acupuncture, massage treatment. 2, occipital neuralgia, mainly manifested as paroxysmal or persistent pain in the posterior occipital area, you can give nerve nutrition and pain relief medication. 3, fever, after eating unclean food will lead to an increase in body temperature, cerebral vasodilatation will cause headache, need to monitor the temperature and blood routine to understand the situation, if necessary, anti-infection treatment. 4, cerebrovascular accident, eating with emotional excitement or eating too fast may lead to a sudden rise in blood pressure, especially in patients with previous high blood pressure, hypertension, diabetes, prone to cerebral hemorrhage or cerebral infarction. Need to go to the hospital to monitor blood pressure, if necessary to perform cranial CT examination.