Headache a few days after the eyes see things heavy shadow, may be related to glaucoma, cerebrovascular disease, intracranial disease and other conditions. 1. Glaucoma: Glaucoma patients due to increased intraocular pressure, resulting in damage to the optic nerve, the patient will experience headaches, blurred vision, see things in a fog, nausea, eye swelling and other uncomfortable symptoms. 2. Cerebrovascular disease: If the patient has cerebral vasospasm, after the onset of the disease, the patient will experience headache and eye double vision and other uncomfortable symptoms. If the patient has occipital lobe infarction, forehead headache and abnormal vision will occur. If the patient has cerebral thrombosis, the condition will be aggravated, and the patient may also have symptoms such as heavy shadow in the eyes and vision loss. 3. Intracranial diseases: If the patient has intracranial inflammation, intracranial tumors and other diseases, dizziness, headache, double vision and other uncomfortable symptoms may occur. It is recommended that patients with obvious symptoms such as headache and blurred vision should consult a doctor in time to assess their condition and follow the doctor’s instructions for treatment.