High homocysteine suggests that it may cause and combine with coronary artery heart disease, myocardial infarction, cerebral infarction, diabetic nephropathy and other diseases, and can be referred to cardiology, neurology, nephrology and other related departments. 1. Cardiology: If the patient has symptoms such as chest tightness, chest pain, palpitations, etc., it is recommended to go to the cardiology department. Combined with coronary angiography, cardiac ultrasound, cardiac enzymes, electrocardiogram and other tests, it can determine whether the patient is suffering from coronary heart disease, myocardial infarction and other disease pairs. 2. Neurology: If the patient has symptoms such as chest tightness, dizziness, etc., it is recommended to go to the Department of Neurology for brain CTA examination to determine whether there is cerebral infarction and other diseases. 3. Nephrology: Patients with a history of diabetes and high homocysteine levels should consult a nephrologist to investigate the presence of diabetic nephropathy. There are many causes of high homocysteine, it is recommended to go to the hospital in time and consult the relevant departments according to the clinical symptoms and identify the causes for timely treatment.