High D-dimer indicates abnormal coagulation function in the body, which may be both physiological and pathological factors. If there is no abnormality in these indicators, there is no need to worry too much and regular review at the hospital is sufficient. However, if thrombosis is found, it needs to be treated with drugs as soon as possible. Generally, it needs to be treated with volume expansion, de-agglomeration, anticoagulation, etc. If necessary, it also needs to be treated with thrombolysis, or thrombus extraction under intervention, and the specific treatment plan can be consulted with the doctor in charge.